Kakuzu wins this mid difff
--Doton: Domu prevents kakuzu from sasoris poison just fine, where sasoris attacks wont have the power to breach his defenses, meaning that he has no way of taking kakuzu down,
--Kakuzus large scale katon+fuuton and his raitons then obliterate all of sasoris puppets completely, as their AOE and power ensures that multiple puppets are taken out in one go,,not to mention that kakuzu has the speed to evade most of their attacks just fine, and with the assistance of domu and his tendrils means that sasori is crushed,