I would buy this one:
http://www.meijer.com/s/20-inch-cfg-...cle/_/R-170032
because of the nice frame and pedals !
it aren't trial cranks, but I don't think it is a problem to do trial with them

so which one of these is best for trials

I ride the koxx carbon uni ^^
XTP if it doens't cost more than 350 euro..
I think green spirit and alien backflip are the same, but with other colours..
if it is for pure trial / big street, go for the devil fluo because the pedals are much better! and cheaper uni..

but the best thing is probably the devil 2!!
it is light and strong!

hey bro wat do u ride and what do you suggest xtp fluo, devil, green spirit, or alien backflip for trial/street