The useful way to compare v0 and VibeCode is on one concrete job: building a small business web app with logins, per-user records, and enough structure to survive daily use. That job matters because these tools diverge at the architectural level. v0 is fundamentally a frontend generator, while VibeCode is oriented around shipping mobile-native apps with a built-in cloud backend.
That makes this job a good stress test for the failure modes that actually hurt. A business web app is where pretty UI stops being enough, and where auth, data isolation, responsive desktop layouts, and the cost of repeated fixes start to dominate the outcome.