Nike Zoom Fly 6 vs Adidas Adizero Boston 13:
Which to Choose

The clearest split is the plate and the foam built around it. The Zoom Fly 6 runs a full-length carbon-fiber Flyplate under a tall, resilient ZoomX midsole (roughly 42mm at the heel), giving a stiff, aggressive forward tip and a springy, bouncy ride with real pop when you're moving at pace. The Boston 13 instead threads glass-fiber composite EnergyRods through a dual-density stack — soft PEBA-class Lightstrike Pro on top over a firmer Lightstrike 2.0 base — for a more planted, purposeful roll that rewards a quick cadence rather than snapping you forward off a rigid lever. That difference shows up in stability: the Boston rates a notch higher (4/6 vs 3/6), and in practice its firmer bottom layer and lower-profile build keep the platform steadier, while the Zoom Fly's taller stack brings a bit of side-to-side wobble at slow jogging speeds. Geometry differs too — the Zoom Fly's 8mm drop gives a slightly more cushioned heel and a steeper ramp toward toe-off, versus the Boston's 6mm, which sits flatter and asks a touch more of the forefoot. In weight they're close, both landing in the mid-250s-to-265g range for a men's shoe, with the taller Zoom Fly the marginally heavier of the two. Both hate easy recovery jogging and come alive only with intent, but their sweet spots tilt slightly: the Zoom Fly 6 is happiest at half-marathon pace, while the Boston 13 stretches best across the half-to-marathon range as a fast long-run and race-day trainer. The Boston also wears a full Continental rubber outsole, a hard-wearing, grippy compound, where the Zoom Fly places training rubber only at key wear zones.