Although Im going to use my Gibson LP's bridge 'bucker placement for my new gutiar, I highly disagree with listening to the sound of a bridge pickup on different giutars, pick the one you like, and use that. There's so many more deciding factors (like people have pointed out) wood types, neck types, strings, other hardware etc. Just too inaccurate, you'd probably end up dissapointed. Maybe not in some cases though.
Anyways just ordered my bit from stewmac so i route in a couple days..