Profiles are made from chromoly which is less stiff it abosrbs shock much better, so its better for street. Chromoly cranks tent to bend before they break.
Powerbites are used more for dirtjumping cause theyre lighter and they dont need to do as much abosrbing. Becuase they are made from aluminum they tend to crap before they break.
If youre doing 6 foot drops to flat you will break everything, unless you're incredibly trials steeze smooth.
I ran powerbites for a while for dirtjumping and they worked really well, just had to clean and regrease them a couple times cause sand would get in and make irratating noises.