pro puzey

hi i no a bit about pitbikes, but not much and i was wondering what would be a better buy, a pro 125 puzey, or a motovert krusha with a gpx 125cc racing engine in it? the motovert is going for about $500-$600 and the puzey is $1000 (im going to try and ask for it for less) thanx, any comments...