Nike Zoom Fly 6 vs Adidas Adizero Adios 9:
Which to Choose

These shoes share a surprising amount on paper — both are neutral, both score 5/6 for pace and responsiveness, and both lean on a PEBA-family superfoam — yet underfoot they feel like opposites, and the reason is stack and plate. The Zoom Fly 6 is a maximal, tall shoe: roughly 40mm of ZoomX at the heel and 30mm at the forefoot for an 8mm drop, wrapped around a full-length carbon Flyplate that gives a firm, propulsive forward tip. The Adios 9 is deliberately minimal by comparison, sitting at about 25mm heel and 19mm forefoot for a 6mm drop on full-length Lightstrike Pro, with only a nylon shank rather than a carbon plate — so the ride stays flexible, firm, and close to the road. That gap shows up in weight, too: the Adios 9 is a true featherweight at around 176g, while the Zoom Fly 6 is roughly 244g, a meaningful difference you feel on the track versus on a long run. The payoff is that they shine in different zones. The Zoom Fly 6's deep ZoomX stack and carbon plate protect the legs and keep rolling from 10K through the full marathon — the half is its sweet spot — and it's happy at sustained tempo and uptempo long runs. The Adios 9 is at its best in the 5K-to-10K fast zone, where its low stack and springy foam feel snappy and direct for PR attempts and intervals; ask it to go long or slow and the thin, firm platform starts to feel harsh. Stability is a wash — both are moderate 3/6 neutral platforms — though for different reasons: the Adios is low and planted, while the Zoom Fly's tall stack can wobble a touch at jogging speeds. Neither is a recovery shoe; both demand intent to come alive.