The short version
Both are premium hybrid apps with cinematic UX. Othership focuses on pure breathwork; Open blends breath + meditation + movement.
When Othership is the right pick
If breathwork is the goal and you want it as cinematic music-driven experience with the strongest live community layer — Othership is the right shape.
When Open is the right pick
If you want one premium app covering breath + meditation + movement rather than stacking three specialist apps, with named-instructor production — Open is the right shape at lower price.