The fairest way to compare Emergent and Same.new is to judge them on one concrete job: a small business app with logins and isolated per-user data. That job matters because the two tools diverge at the foundation. Emergent tries to generate a working full stack from prompts, while Same.new starts from visual cloning and leaves the real application plumbing largely to you.
This job exposes the failure modes that matter because business apps do not fail on aesthetics first. They fail when auth is brittle, data access is wrong, or a quick fix silently damages working logic. A tool that looks fast on a marketing page can become expensive the moment you need secure records, stable revisions, and code that survives more than a demo.