I love these topics.
I will probably catch a little crap for this but.......
I have owned both, will continue to buy both.
My yfz 450 is the bike i ride at the cinders, mx track, even the dunes. I dont ever break anything, its got electric start, i can use pump gas on long rides (crown king).
My banshee is a hill monster and can smoke 98% of the four strokes. BUT...... I need to work on it a bunch. And its only used at the dunes.
I know that you can work on the banshee and fix it for the type of riding you do, but if you take a stock banshee vs a stock 450 from any manufacture it will get destroyed at an mx track and majority of the trail races.
Fire away boys!