(This thread/VS. is already out there, and well-discussed, BTW)
Circe takes the edge in this, maybe 6/10 or so. Enchantress is powerful, and will get wins, but her better bet is to try to mitigate as many of Circe's spells as possible and exploit her physical superiority (not a given, by any means, as Circe's used to going up against the likes of WW, but that strategy will get Enchantress many/most of her wins).