Asics Novablast 5 vs Saucony Endorphin Azura:
Which to Choose

Start with how close they really are: 8mm drop on each, essentially the same stack (41.5mm heel / 33.5mm forefoot on the Novablast, 41mm / 33mm on the Azura), and weights that sit within a few grams — the Azura is 241g in a men's US9 and the Novablast lands around 247g, so you won't feel a meaningful difference on the foot. The real split is the midsole material and what it does. The Novablast's FF Blast Max is an EVA-based superfoam with a distinct trampoline-like snap — it springs you forward and rewards a rolling, bouncy cadence. The Azura runs on full-length PWRRUN PB, a beaded PEBA foam that reads as plusher and more premium underfoot, soft-yet-resilient with a smooth, rolling rebound rather than a sharp pop. Stability is the other concrete difference: the Novablast's wider, flared base keeps that tall platform notably more planted and predictable (it rates a touch higher for stability), while the Azura's softer PEBA stack feels a bit tippier at very slow paces and asks for a more confident footstrike. Both come alive only once you're moving — neither loves a dead-slow plod — but their tuning differs: the Novablast's sweet spot is steady long runs and relaxed half efforts (optimal around 4:45–5:45/km), whereas the Azura leans slightly more uptempo, with the half as its home and a quicker comfort band (about 4:30–5:15/km) that suits progressions and long tempo work. Both top out in the same place, holding their rebound down to roughly 4:15/km before a plated racer would make more sense. One practical note on materials: the Azura's PEBA is the lighter, more resilient foam chemistry, while the Novablast's exposed EVA-based foam asks for a little care to protect long-term durability.