Prets are 19x8.0 ET50. Santiagos are 19x7.5 ET51 which is exactly the same as the Brescia wheel, a factory option on the Clubsport so they should clear the calipers fine.
The only question here is the 235 tire width on a 7.5 wheel, generally 235 is the max recommended width on a 7.5 wheel, and it will probably give slightly less "direct" feeling and maybe minor "baloon look" but it's still on the allowable side.
PS. Are you selling your Pretorias? I am about to order a new summer wheel set and Prets were always high up my list but could not find a reasonably priced set in glossy black. If yours are drop me a PM.