I do know that I drive torque, while listening to my friends prattle on about horsepower.
...BTW your Bieber avatar is awesome.-Malone
I've found that on (some? most? all?) mk2 alts - the gassers have smaller bolt holes at the bottom mount - than the diesel counterparts. Have had to bore a couple out with a drill to get fit on a diesel bracket with the larger bolt.fwiw
I would pick the Bosch over the GM unit.