well there very different
RAD bars:
backsweep
made of cromoly
can come in HIC or standard size
light (but not as light as aluminum bars)
very strong
can use HIC compression, SCS, baby SCS, ICS, or threaded
Torn bars:
no backsweep
made of aluminum
come in oversized outside, regular inside ( so need and oversized clamp)
can only use ICS, Threaded, or full SCS
very light
not as strong as crows but still very good