Well, not sure if there ever was such a thread, thus I got an idea to put these two against each other.
Basically, it's the same final battle against Toneri that happened in The Last movie (on the Moon surface), but with Sasuke in Naruto's place. Their forms:
Sasuke: his Last form. Although I admit we got almost nothing about his power at this point, but I think it'd still include all the abilities shown at the end of the FSWW (Rinnegan is here too), plus his upgraded Chidori version (the single thing shown in the Last). Of course, no Biju powerup like in the final VoTE battle/no Hagoromo's chakra boost.
Toneri: the only form we've seen him battling, with fully awakened Tenseigan and its stuff. Also, I'd additionally allow him to use Hamura's Statue in the fight, but I can remove it if it's too OP.
Should be clear that neither of them has any knowledge of each other's abilities.
So, you can make your choice.