they both come in silver and black tho.

op. if you insist on sticking with loose ball, I'd go Hatta. cause mirror polish, only a little more expensive than normal sg75, and a little less than super lap sg75. + most dope.

but realistically, unless it's a show-bike or a dedicated track bike, I'd recommend the Sugino Prototype BB. It's a sealed cartridge bb designed for the 75's, and it's like $35. Sealed cartridge = less maintenance; less maintenance = longer crank life, because you aren't removing/installing the cranks every six months to clean and repack the bearings, so you aren't blowing out the taper on the cranks.