Asics Dynablast 5 vs Brooks Hyperion 3:
Which to Choose

Start with what's identical, because a lot is: both run an 8mm heel-to-toe drop, both are neutral with a middling, non-corrective platform (no medial post, no plate), and both derive their pop from a springy foam rather than any structure. Where they split is weight and underfoot geometry. The Hyperion 3 is the lighter shoe at roughly 241–244g in a men's US 9, against about 260g for the Dynablast 5 — a real ~15–20g gap you'll notice on faster reps. But the Dynablast carries more foam: a lab stack around 38mm heel / 30mm forefoot versus the Hyperion's slimmer 36mm heel / 25mm forefoot. That 5mm of extra forefoot is the crux of the ride difference. The Hyperion's thin 25mm forefoot gives sharp ground feel and a firmer, more connected turnover that rewards a fast rolling stride, but can feel a touch harsh on tired legs or long slow jogs. The Dynablast's FF Blast+ is light and bouncy with a hair more everyday softness and a bit more protection under the ball of the foot, so it stays comfortable a little longer while still coming alive when you speed up. Pace zones reflect this: the Dynablast is optimal around 4:45–5:30 min/km and best pushed to 4:30–5:00, while the lighter, firmer Hyperion wants 4:30–5:30 and rewards you most when you lean into 4:15–4:45 min/km. Both fade past half-marathon distance as the modest cushioning thins out. In short — same category, same distances, but the Hyperion is the leaner, firmer, slightly faster-leaning tool, and the Dynablast is the marginally softer, more protective everyday version of the same idea.