Asics Dynablast 5 vs Brooks Launch 12:
Which to Choose

On paper these two score almost identically — pace 4/6, responsiveness 4/6, stability 3/6 neutral, an 8mm drop, and no plate in either, so the pop in both comes purely from the foam rather than from a stiff propulsion element. The real split is cushioning versus ground feel. The Dynablast 5 carries a taller, more protective platform — roughly 39mm of heel stack filled with Asics' FF Blast+ foam — and rates a notch higher for cushioning (4/6), giving it a bouncy, moderate everyday softness that holds up better as the miles stack toward half-marathon distance. The Launch 12 is the firmer, more minimal of the pair: a lower 33mm heel / 25mm forefoot stack of nitrogen-infused DNA Flash foam (snappier v2 in the forefoot, v1 in the heel) that sits at 3/6 cushioning and feels firm-leaning and ground-connected rather than pillowy. That firmness is deliberate — the Launch is flexible and snappy through the forefoot, rewarding quick turnover and letting you feel the road, whereas the Dynablast gives you a touch more isolation and a smoother, rolling transition. Weight favors the Launch, at a light 244g versus roughly 260g for the Dynablast, which reinforces the Launch's crisper, more race-like character; its fastest effective zone (around 4:15–4:45 min/km) edges slightly quicker than the Dynablast's (around 4:30–5:00 min/km). Both go flat and unremarkable at slow plodding paces and come alive when you pick it up — so neither is your easy-day cruiser.