[Chris is me]

I don't think there needs to be a distinction made between "shooter" and "dumper" as much as one needs to be able to track how many balls make it into the trailer and how many seconds it takes to dump said balls. I've seen a number of shooters that unload as fast as many dumpers, and lumping them into categories like that doesn't really give the full story.

An advantage to a "shooter" (especially turreted models) that's been underutilized is the defensive capabilites retained while unloading. A shooter is free to pin one robot against a wall while firing against another (this was roughly what my team was going to do against 1625, but other problems arose). There's also a great advantage in a tracking shooter being able to move and hit at the same time, as the key to the game is really "don't get hit".

All in all, it comes down to the bottom line: In (arbitrary amount of seconds), the number of balls that are in the trailer is all that matters, regardless of design.