Q. Does the sitting posture comfortable on RC 200?

First thing it's not a cruiser so you can't expect the things from a sports bike which you get out of a cruiser. Talking about as a sports bike it's highly aggressively designed to make you confident and comfortable at high speeds and corners. It can be a bit annoying in the traffics or hilly areas.

The ride position is aggressive well suited for track purpose. On urban conditions only rider is much more comfortable than with pillion.

Yes,the sitting position is comfortable.