Nike Alphafly 3 vs Asics Metaspeed Edge Tokyo:
Which to Choose

Start with weight, because it is the clearest gap: the Metaspeed Edge Tokyo is a measured 159g in a men's US 9, among the lightest supershoes made, while the Alphafly 3 comes in around 218g — a noticeable chunk more shoe underfoot. Both shoes carry roughly the same height of foam (about 40mm at the heel, with the Edge a touch higher and closer underfoot at ~34–35mm) and a moderate drop (8mm on the Alphafly, ~7mm measured on the Edge despite Asics' 5mm marketing figure), so neither is lower-profile than the other — the Edge just does it with far less mass. The ride is where their personalities split. The Alphafly leans on ZoomX foam plus twin forefoot Air Zoom pods for a soft, trampoline-like pop at toe-off; it feels planted and explosive once you're truly pressing, but tall and a little unwieldy if you back off. The Edge Tokyo uses a softer A-TPU (FF Leap) forefoot over a firmer FF Turbo+ heel, giving a smoother, rolling rocker that snaps crisply through transitions and particularly favors midfoot and forefoot strikers who hold cadence rather than over-stride. Both are narrow, tippy platforms with zero stability support and thin, fast-wearing race outsoles meant to be saved for key sessions and race day. The last meaningful difference is range: the Alphafly 3 is purpose-built for the half and especially the marathon, where its cushioning and pods pay off over distance, whereas the Edge Tokyo stays sharp all the way down to 5K and 10K as well as the longer stuff, making it the more versatile single racer across the calendar.