I check both servers at euro prime time regularly and there's not more players doing minis or bori on crom compared to fury. It's virtually the same (despite the ridiculously higher pop) but the difference is fury has a bit of pvp in all kinds of random places too (there's even lowbie minis apparently), such as NG and khesh. But the thing is with open world pvp that's it's totally random and unpredictable so when people ask me where and when it happens I can't really reply.
People who transfer to crom for pvp are making a terrible mistake (if they want to pve on the other hand I won't stop them). But yeah, people always think the grass is greener on the other side
The game simply has a very low number of dedicated pvpers, no matter the server. But having the freedom of fighting anywhere anytime is important to some people like myself.