Meh, maybe a little. I'll say this for the 75B, its thinner and a little lighter than the Sp-01. Easier to conceal should you decide to move to a reasonable state and get a carry permit. (and you can have high cap mags. Not that you couldn't just carry a bag full of 10 rounders and keep reloading. Who are they kidding? yes... themselves.)
As far as a factory SP-01 over a tuned 75B, well, IDK about that. I know that after some rounds down range, the SP-01 will polish itself out. And as far as eating oil, mine doesn't, and I've shot it in the sand, mud, rain, ect in competitions and its never failed me once. (even in the rain I never oiled it, but I hosed it out after the competition. lol)The replacement springs for the SP-01 are cheap as hell and fix the "slide slap" of the factory recoil spring and the hard pulling main/hammer spring. 11lb recoil and 13lb hammer is what I'd recommend and you can get those for I think $12 after shipping. If you want something sleek and sexy that will make people pee themselves, then get the 75B, but if you like beefy, tactical, steel toe kodiak grip workboot kick to the face, and make people poop themselves in fear, then go for the SP-01. Thats my 2 cents.