On Cloudboom Zone vs On Cloudboom Strike 2:
Which to Choose

The defining difference is the plate: the Strike 2 runs a full-length carbon Speedboard that, paired with its PEBA-based Helion HF foam, produces a stiff, propulsive, rolling toe-off, while the Zone deliberately goes plateless and lets a softer, livelier Helion HF midsole do all the work on its own. That shows up in the ride — the Zone feels springy but forgiving and comes alive in an uptempo-to-steady zone (its sweet spot is the half marathon around 4:15–4:45 min/km), whereas the Strike 2 only truly switches on at hard race effort, roughly 3:00–3:30 min/km and faster, and feels like more shoe than you need at easy pace. Counterintuitively, the Strike 2 is both taller and lighter: it stacks about 40mm heel / 35mm forefoot at roughly 200g in a men's US 9, versus the Zone's 35mm / 29mm at about 224g, so the race shoe gives you more foam under the foot for less weight. Drops are close — 6mm on the Zone, a claimed 5mm (and lower in practice) on the Strike 2 — so neither forces a big change in strike pattern, though the Strike 2's low, narrow racing platform clearly favors forefoot and midfoot runners. Stability is modest on both and worse on the Strike 2 (2/6 versus the Zone's 3/6); both can feel tippy at jogging speeds, but the Zone's shorter, slightly wider stack is the more planted of the two when you're not pressing. Both also share a durability caveat common to tall superfoam shoes — the Zone's soft stack can lose snap over high mileage, and the Strike 2's minimal open-weave upper and race stack are tuned for performance over longevity — so neither is the shoe you grind every daily mile into.