What is the difference between churidar and pyjama in Indian men ethnic wear?

Both are trouser styles worn with kurtas — but they have very different silhouettes:

Churidar: Fitted trousers that are tight from the knee down and have extra length at the ankle that gathers in bunched rings (churi = bangle — the gathers look like bangles on the ankle). Pairs best with longer, fitted kurtas and Anarkali styles. Creates a sleek, elegant silhouette.

Pyjama (Salwar pyjama): Wide, loose trousers — comfortable and relaxed fit throughout. Tied with a drawstring at the waist. The standard bottom for everyday kurta-pyjama sets. Multiple regional variations exist.

Aligarhi Pyjama: Variation of pyjama that is wide at the top and tapers at the ankle (like salwar) — popular in North India and particularly among Muslim communities.

Wholesale: Kurta-pyjama sets (2-piece, loose fit) are the highest-volume men ethnic wear product in wholesale. Churidar sets are more festive-focused and slightly lower volume.