To be fair, APC and Tool are two of the greatest bands to hit rock music since the 70's. That said, Tool are just on a whole other level musically than APC. Not to take anything away from APC, but Tool's music interests me more. Really though, a person could choose one or the other and it's not even a point I'd argue. Both are great. To compare the sole common denominator though, I generally prefer Maynard's vocals on Tool albums, although much of his singing on Mer de Noms was simply brilliant. Definitely one of my favorite singers of all time.