Would I be giving up a lot of quality by buying a 6' 2004 Puma (made by Pronovost) used lightly for $1300 or a P620 Provonost used maybe twice for $2800. Is there a lot of differences in the 2 knowing that they are made by the same company. BTW the Puma weighs 430 lbs while the Pronovost weighs 575 lbs. Any opinions??