TER reviews aren't as accurate, there are a bunch of fake reviews good and bad so I wouldn't trust the ratings on there as much.
Everybody has their own preferences when it comes to kgirls. For most of these girls, YMMV is important. If you're only visiting once or twice and expecting the girl to treat you like her regulars, that's not going to happen.
Lucy is pretty and hot to me, never saw Cora though but I've spoke to a few others that spoke highly of her since they're regulars.