New Balance Fresh Foam X 860v14 vs New Balance Fresh Foam X 860v15:
Which to Choose

Both shoes carry a 5/6 stability rating and target the same paces (roughly 5:00–6:00 min/km for daily and long-run tempo), so at a glance they're twins — but the way they deliver that stability and cushioning is where they split. The v14 rides firm and grounded: its Fresh Foam X is the firmer, moderately resilient tune, cushioning rates 4/6, and stability comes from a broad base plus medial support geometry with no plate at all, so what little spring there is comes from the foam. The v15 goes softer and taller — cushioning jumps to 5/6 with a plush, pillowy single-density foam sitting around 40mm at the heel and 32mm at the forefoot, and stability is now handled by a full-length medially-wedged plastic "Stability Plane" that guides gently instead of correcting with a firm post. That extra foam and hardware add heft: the v15 is a substantial trainer at about 332g in a men's US 9, and it's the heavier, less nimble of the two, where the v14 is the lighter, firmer, more purposeful-feeling shoe. The drop also drops — 10mm on the v14 versus 8mm on the v15 — a slightly less heel-biased geometry in the new model. In feel terms, the v14 stays composed and rewards running with intent (its firm foam can feel a touch dead at true recovery jogging), while the v15 absorbs more than it returns, trading pop for calm, cushioned comfort that can feel a little floaty when you slow right down. One more practical difference: the v15's engineered synthetic upper is denser through the midfoot and heel for lockdown and runs warmer, whereas the v14's engineered mesh is the more breathable of the two. Neither is a tempo tool or racer — both go vague if you push much past ~4:45 min/km.