Saucony Endorphin Speed 4 vs Mizuno Wave Rebellion Flash 3:
Which to Choose

September 30, 2026

Verdict

These two are close cousins in spec but different in temperament, so it comes down to range and ride, not quality. If you want versatility and a smooth ride that scales from tempo to marathon, take the Endorphin Speed 4. If you're a forefoot-driven runner who wants an aggressive, rocker-assisted 10K-to-half specialist and won't miss a shoe for long, easy days, the Wave Rebellion Flash 3 is the more exciting tool — just accept that it's a specialist, not an everyday trainer.

Saucony Endorphin Speed 4

120.00 USD

Mizuno Wave Rebellion Flash 3

162.01 USD

Pace

5 of 6

Cushioning

5 of 6

Responsiveness

5 of 6

Stability

3 of 6

Drop

8 mm

Support

Neutral

Plate

Composite

Distances

5K10KHalfMarathon

Pace

5 of 6

Cushioning

5 of 6

Responsiveness

5 of 6

Stability

3 of 6

Drop

7 mm

Support

Neutral

Plate

Composite

Distances

10KHalf

At a Glance

Saucony Endorphin Speed 4Mizuno Wave Rebellion Flash 3

Who Should Choose Each Shoe

Choose

Saucony Endorphin Speed 4

Choose the Endorphin Speed 4 if you want one shoe to cover most of your week — easy-adjacent miles, tempo days, and racing from the 5K up to the marathon. It's the better pick for runners who value a smooth, composed roll and forgiveness across paces and foot-strikes, and for anyone who wants marathon range rather than a workout-only tool. Its lower, more conventional stack and 8 mm drop also make it the safer bet if you're stepping up into plated trainers for the first time.

Choose

Mizuno Wave Rebellion Flash 3

Choose the Wave Rebellion Flash 3 if you're a confident midfoot or forefoot striker who lives at 10K-to-half efforts and wants a shoe that actively throws you forward. Its taller 40 mm platform and aggressive rocker reward a purposeful, forward-leaning mindset and make fast, sharp workouts feel electric — but you should be honest that it feels tippy at jogging pace and isn't built for slow long runs. It's the better call for a dedicated tempo-and-race shoe rather than an everyday do-everything trainer.

Head-to-Head

Start with the geometry, because that is where these two genuinely diverge. The Flash 3 sits on a taller 40 mm heel / 33 mm forefoot platform with a measured ~7 mm drop, while the Speed 4 is lower and more conventional at 36 mm heel / 28 mm forefoot with an 8 mm drop. That extra Mizuno height is paired with an exaggerated rockered heel bevel that almost tips you into the next stride at tempo — thrilling when you're pressing the pace, but noticeably tippy and unsettled when you slow to a jog, and it strongly favors midfoot and forefoot strikers. The Speed 4's winged nylon plate and contoured base deliver a smoother, more forgiving roll that stays composed across a wider range of paces and foot-strikes. The foams differ too: Saucony's PWRRUN PB is a PEBA-based superfoam that feels soft and springy with resilient rebound over long efforts, whereas Mizuno layers a soft Enerzy XP (TPEE) top over an Enerzy NXT (EVA) base — protective and lively but tuned for shorter, sharper efforts. Weight favors Saucony slightly, 233 g versus 244 g (men's US 9), though both are light for their category. The biggest practical split is versatility of range: the Speed 4 genuinely excels from 5K through the marathon, with the half and honest tempo work as its sweet spot, while the Flash 3 shines over 10K and the half and is explicitly not the tool for slow long runs. One more livability note — the Flash 3's double-layered mesh upper runs a touch warm, while the Speed 4's engineered mesh is more straightforwardly breathable. Neither is a stability shoe; both are moderate, neutral rides with no dedicated pronation support.