The Surface-Level Similarity
A Next.js app is a Next.js app, right? Not quite. The moment you introduce multi-tenancy, audit logs, SSO, and granular permissions, you're operating in a fundamentally different engineering paradigm.
The Critical Differences
B2B requires: data isolation per tenant, role-based access control from day one, audit trails for compliance, and API-first design for enterprise integrations.
B2C requires: performance at scale, social features, and a mobile-first experience.