A showty can should always be more aggrisive (not always louder though).
Turn up the bass and watch in HQ
Stock scorpion (not sure what it was meant for)
http://www.youtube.com/watch?v=CmM8P...e=channel_page
Stubby Yoshi (probably half size)
http://www.youtube.com/watch?v=Qa1bg...e=channel_page
Not necessary louder but you hear the deepness of the growl.