Saucony Endorphin Speed 4 vs Salomon S/Lab Spectur:
Which to Choose

Start with what's the same, because a lot is: both run an 8mm drop on a tall, neutral platform, both weigh in around 230–235g, and both use a flexible winged composite plate (nylon in the Saucony, a TPU Energy Blade in the Salomon) rather than a stiff carbon one, so neither has that tippy, locked-in race-plate feel. The split is in the foam and the intent. The Endorphin Speed 4's PWRRUN PB is a PEBA-based superfoam that feels soft, bouncy and forgiving — it rolls you forward at tempo but is tolerant enough to survive everyday miles, which is why its range honestly stretches from the 5K all the way to the marathon, with the half and tempo days as its sweet spot. The Spectur's Energy Foam is deliberately firmer and snappier; there's a sharper pop off the toe, but the ride feels eager and a touch stiff until you actually lift the effort, and its usable range is narrower — 5K through the half, with the 10K as its home base. The pace windows tell the same story: the Speed 4 comes alive across a broader 3:45–4:45 min/km band, while the Spectur rewards a faster, tighter 3:30–4:00 min/km. Two more practical differences decide it. First, versatility: the Speed 4 can double as a do-most-things trainer, whereas the Spectur is a poor recovery-day shoe — firm and impatient at easy jogging paces. Second, longevity: the Spectur's race-oriented build puts durability, particularly outsole life, more in question than the more trainer-like Saucony.