Clearly a lower difficulty than it was in the manga.
Shinsuusenju already took out Perfect Susanoo when it was armored onto Kurama, though it lost all its hands. Only because Kurama could rapid fire Bijuu Dama equipped with PS's blades, a far greater DC than PS has alone, far greater. If Shinsuusenju and Perfect Susanoo alone had clashed at VoTE, it would have ended with Madara's PS destroyed with Shinsuusenju still intact unlike manga canon.
Without Kurama the battle would have ended there, the last CQC confrontation never would have happened.
That classifies as mid difficulty.