well ye...gotta admit that i'd forgotten about oroch's reincarnation jutsu.that's badaas having kages on ur side.but still i don't know how would they avoid deidara's microbombs and itachi's susano.we don't know if any of them has lightning what would they do with itachi's ultimate attack.
kisame and sasori are strong but no prob for sannins(don't tell me that kisame is *****ing superhuman/let's make god out of him like we did with itachi

).
ok i've grown tired with this arguing
MY verdict is- we don't have enough info so they are about equal.
actually the second they start to fight aizen comes and oooops...but it's another story....