kendas grip better in all conditions but roll slower on the road, noticeably. that's only running kenda or panny on the back, both with blue groove front.
rampages roll better but i can spin them up on the road climb even in the dry.
i'm more confident in the rampages' side walls. the wire bead kendas i have had have had two failures at the bead, at about half worn, but were only 11 quid a go shipped if bought by the pair from woolly hat shop. skid more = less failures.
same tread pattern, one runs reversed compared to the other, oddly.
they're both good tyres. if you want outright grip - kenda. mucho cheapness too.
if you want a little more confidence in longevity - panaracer, though it has to be said that wear rate appears the same if you don't behave like a kid, but i don't expect the bead on the panny to give up. dunno if i'd pay twice the kendas' price though.
i only run these on the rear on my SS.