Slimmer? I would say no.. though they may feel slightly slimmer because the rubber grips have less 'knurl' than the wood grips.
I wish someone would made some rounded G10 grips in black for the 97B.
I know what you mean. I am working on a Custom Grip Maker to take the plunge on the CZ Grips. He said he is just so busy right now, but I will keep hounding him. If you are interested in puting in a request, it may help speed up the arm twisting process.
Let me know via PM and I will get you his info.
PS. He does fantastic work. I bought a pair of Stingray Hide Grips for my 1911.