Lots of variables with mounting hardware. Weight will be one. Aluminum will be much lighter than stainless or brass for example so you can have minor changes in effective mass that might improve or degrade things.
Magnetic vs. non-magnetic hardware would be potential issue with moving coils also-never a good idea to crank magnetic hardware right up against a moving coil cartridge. That could easily affect sound quality as well.
Magnetic vs. non-magnetic hardware would be potential issue with moving coils also-never a good idea to crank magnetic hardware right up against a moving coil cartridge. That could easily affect sound quality as well.