S330 shares the same sampling engine with W30, and with it you can choose between 15Khz and 30Khz samplerates. The bits are always at 12.
Haven't compared it with Akai samplers, tho. Back in the day when I still used my W30 as a sampler, it was everything I had. Now that I have alternatives I don't use it anymore.
Not a believer of the "vintage sampler mojo", as you can probably tell from the previous sentence.