Yeah, I was just skimming looking for Amp ratings... didn't think of calculating the amps.
Still, I'm not sure how much "better" these alternators are because you are still dealing with the x factor of how big of a load your current alternator is versus one of these. For reference, my car's alternator is 25-30 lbs (I haven't seen any exact numbers and haven't personally weighed mine) and outputs 130 amps.
Theoretically, if one of their amps weighs the same and offers the same internal resistance/load on the engine as my stock alternator, but produces 260 amps in the process, it should half the time the alternator is actually engaged. Right? If so, there might be some benefit, but I don't know if that is enough to justify replacing a currently operating stock alternator...