What are the differences between an RS shell and a bonus shell? Or is it just the chassis number to make it the RS?

I re shelled a 1990 Renault 5 GT turbo with a 1995 campus shell, not worth as much as an RS mind you but it was always at the back of my mind it wasn't genuine 😕. It was the cleanest shell going and far better than any GT turbo I could find at the time.

Like other members have said, money shouldn't be an issue over a long period of time. I would personally take my time and have a genuine RS rather than a reshell as a quicker option 👍

Entirely up to you though mate...