I think that is very hard to generalize, as "better" is a matter of preference. It depends on what you like. So nobody will be able to give you a final answer to this.
I can tell you that Gwahlur is on the rise, that we had an increase in members, but we are still a low pop server. The people are very friendly. Newcomers from other server are often surprised that they actually get an helpful answer to questions they ask in global instead of a "stfu n00b".
Its a good and fun place to be and its a server where you will be noticed. You can be actually part of something. You can create. No zerg guilds that have more of a "mob" character then a team character.
The servers guilds are well established, but still relatively small. That makes most guilds looking for ways to cooperate with others.
I've been on Gwahlur since launch day, and I wouldn't consider being anywhere else. It's relaxed, easy going and friendly. Many of our US players have said they rolled on this server because they prefer the Aussie atmosphere. Roll a toon and say hi, we've got a beer waiting for you!
Went to Wiccana though there arent that many people there. Ah who cares, will undoubtedly be unsubbing soon anyways. Great idea behind the game, horrible execution.Some things are fun, but all the unbalanced and bad factors ruin it.