i have one of each. crowbars for bluebird and splice for overcast. personally i find the crowbar has a larger field of vision than the splice. although i prefer the look of the splices so up to you man
the main difference as mentioned by several others is the way the nose fits. i feel that the splices are better suited for an adult male. the nose isnt as tight...and by no means do i have a big nose.
get splices. i have both and lately i have really started to love my splices. sitt really nice on your face, really really easy to change lenses and super wide view. Dont get me wrong i love my two pairs of crowbars (so eighter way you go youll get a great goggle) but the splice just sitt a little better in my opinion.