Saucony Endorphin Speed 4 vs Hoka Mach X2: Which Plated Super Trainer Wins?

Introduction

The Saucony Endorphin Speed 4 and Hoka Mach X2 are two of the standout plated super trainers of the year, and both do a similar job: fast, training-focused shoes with enough versatility to handle a bit of everything. They are also both fairly premium-priced, with the Mach X2 at £170 or $190 and the Endorphin Speed 4 at $180 or £170.

This comparison looks at how they differ in fit, construction, ride feel and overall role in a running rotation, so you can work out which one suits your feet and your training.

Spec and Construction

The two shoes take slightly different approaches to the plated super trainer formula.

The Mach X2 weighs 255g (9 oz) in a UK 9 (US 9.5), with a 5mm drop and a stack of 44mm at the heel and 39mm at the forefoot in the men’s shoe (42mm/37mm in the women’s). Its dual-density midsole pairs a top layer of bouncy PEBA foam with a super critical EVA bottom layer, with a winged PEBA plate in between. The wings sit in the forefoot to add structure and stability, and the shoe uses a rocker geometry with cutouts in the sole to reduce weight. The woven upper is very lightweight with minimal padding, especially around the heel, and the rubber outsole is applied sparingly over key impact areas.

The Endorphin Speed 4 is the lighter of the two, weighing 244g (8.6 oz) in a US 9.5. It runs a higher 8mm drop with a 36mm heel and 28mm forefoot stack. It uses a dual-layer PowerRun PB midsole with a nylon plate, whose wings are positioned more around the midfoot rather than the forefoot. Saucony’s SpeedRoll rocker shapes the ride, and the engineered mesh upper offers more heel collar padding plus an internal heel counter for structure at the back. The lattice rubber outsole has good forefoot coverage with a small cutout, and slightly more rubber than the Hoka, though both deliver similar grip in practice.

Fit and Sizing

Fit is where these two diverge most noticeably, and it may end up being the deciding factor.

The Mach X2 comes up narrow and snug. There is reasonable length but limited wiggle room in the toe box, and runners with wider feet or high insteps may find it cramped across the toe knuckles. The lockdown across the midfoot is tight, which is great for fast efforts but can feel restrictive over long, easy sessions, and some testers report feet numbing slightly. The heel collar has little structure and some movement, so it is worth watching for rubbing. A wide version is available in limited colourways.

The Endorphin Speed 4 delivers an instantly disappearing, natural fit with plenty of room in the toe box, good midfoot lockdown without excessive snugness, and a more traditional padded heel collar that holds the foot securely. It is a shoe you can comfortably spend hours in. If you sit between two sizes, you can genuinely go either way: a slightly smaller size gives a more dialled-in fit, while half a size up adds toe box room. Stick to your normal Saucony and Hoka sizes in general, and be wary of the narrow fit in the Mach X2.

Saucony Endorphin Speed 4: The Do-It-All All-Rounder

The Endorphin Speed 4 is a genuine do-it-all shoe. It offers a lively, cushioned ride that feels light and full of energy without harshness, and it responds with speed when needed while cushioning you when you want to back off or go easier.

The lower stack under the forefoot compared with many modern shoes, including the Mach X2, is noticeable, but the smooth rocker ticks over really well at high cadence. On easy runs the heel feels comfortably squishy, though the relatively low forefoot stack means heel strikers slapping through on long hard runs can pick up a touch of forefoot or foot-pad soreness. It is not a major issue, but it is more noticeable than anything in the Mach X2.

Versatility is this shoe’s calling card. It handles progression runs, track sessions, tempo runs, easy runs and recovery runs, and it fills in well for carbon-plate racing shoes if you want a slightly cheaper option for race day. It is also more grounded and stable than the Mach X2, thanks to the firmer, lower forefoot feel.

Hoka Mach X2: The Punchier, Racier Option

The Mach X2 is a significant step up from the original Mach X. More PEBA foam, a higher stack and a tweaked plate have breathed real fire into the midsole, and there is now clear daylight between this shoe’s energy and Hoka’s non-X Mach trainers. There is much more “super” in this super trainer.

The ride is bouncy, springy and rolling, with a steep rocker that aggressively rolls you from touchdown through to toe-off. The foam compresses slightly and kicks back quickly, and because of the 5mm drop it does not snap through as sharply as the Speed 4. Instead you get more of a loping, booming, bouncy ride. It is the faster-feeling shoe of the pair and much closer to a carbon racer in character, making it a strong pick for faster training efforts and even races up to a half marathon. The longest tested runs sit around the two-hour mark.

The trade-offs are the racy, barely-padded upper, the snug narrow fit, and the minimal heel counter, which some runners may find a little choppy. It is not unpleasant at slower paces, and a 5K jog as a track warm-up proved comfortable and stable, but it is nowhere near as easy for slow mileage as the Speed 4. This is a shoe that begs you to go faster.

Ride Comparison: Two Different Flavours of Fast

Running one shoe on each foot makes the differences obvious. The Mach X2 is the punchier, more aggressive and faster shoe overall, with more energy coming back from the midsole, plate and rocker combo. It almost rolls and pings you forward. The Endorphin Speed 4 now feels a touch flatter by comparison, with a slightly less pronounced rocker and a bit more midsole compression, and it asks you to punch a little harder into the ground to get energy back.

But the Speed 4 offers more control, a more subtle ride and more overall comfort. It is more versatile across a pace range, more accommodating at slow paces and still capable when you push. The Mach X2 is happiest at top-end paces in attack mode. If you had to race a 5K, 10K or half marathon in one of them, the Mach X2 is the pick; for a two-hour run with marathon-pace intervals mixed in, the Speed 4 is the better tool. These two could arguably fill different roles in the same rotation.

The Verdict

Both are excellent shoes, right at the top of the pile for faster, more capable daily trainers, and both are probably worth their price tags.

If you like a locked-in race fit with a punchy, springy, heavily rocker-driven ride, the Hoka Mach X2 is the shoe for you. It is the more exciting shoe, the more aggressive one, and the one closer to a carbon racer. If you prefer speed and energy in a more subtle, stable, less aggressive package with a natural, roomy, disappearing fit, the Saucony Endorphin Speed 4 is the better choice, with more versatility thanks to its comfort, stability and cushioning.

On price, it splits by region: the Hoka is cheaper in the UK, the Saucony in the US, so a discount may be the deciding factor. Otherwise, choose on ride feel: more bounce and springiness with the Mach X2, a slightly nimbler, quicker turnover with the Speed 4. It is a very close call.

Conclusion

The Endorphin Speed 4 and Mach X2 are two of the best plated super trainers you can currently buy, and both do everything well. Pick the Mach X2 if you want the racier, bouncier, more aggressive ride for fast sessions and shorter races. Pick the Endorphin Speed 4 if you want one comfortable, stable shoe that handles every run in your week. Either way, you are getting one of the top shoes in the category.