well all i know is that hifonics maxxsonics and crunch is all the same thing and i have a couple of crunch 8" subs and i think that they have some nice features on them and are some preaty darn nice subs here is a site if you want to compair the 3 http://www.maxxsonics.com/
Russell don't buy the Hifonics subs. Save your money and look into getting a pair of Adire Shiva 12's. They are cheap and they sound excellent. I hope this helps.