the thing is, if zoro used same force that he used to slash golem but with enma, it would've destroyed dressrosa and thats the point i'm making here, if you deny enma is a powerup then i dont wanna argue with you, go away
Enma is a power up in terms of shere attacking power. But is it really a power up to this point? Enma eats a lot of Haki and Zoro's Haki endurance is probably significantly lower. Also Zoro was completely used to Shisui, he fought and trained with it for years - and dont underestimate Shusui, the permanent black blade of swordgod Ryuma.
I think if its about launching more powerful attacks, thus more important against Kaido/Meme, Enma Zoro > Shusui Zoro
But if its about a fair 1v1 fight which could perhaps go for pretty long, lets say Zoro vs Killer or Who's Who or so, Shusui Zoro > Enma Zoro