Hey guys - anyone that can help?

I own a 1990 964 that I run my track tires with on 17" Porsche OEM Cup II's
(993 era wheels).

I own a 2001 Boxster S that came stock with 18" turbo twists.

My question is are they swap-able? Can I run the 17" track setup on the Boxster, and can I mount the 18's on my 964? Are the offsets compatible?

Thanks!!