More than 2 years after voting on this, I am back.
I voted vuze at that time, switched to utorrent at the end of 2012, started running deluge along with it in the middle of 2013, dropped utorrent a couple of months since I didn't have to seed 100+ torrents anymore(which was the reason I picked it up) and now I am again trying to choose between deluge and vuze.
Here is what I think about both of them
Vuze: I need only for downloading, not everything else that comes along with it. Using 100mb of ram with 2 torrents is stupid. Force updating is shit and forcing me more when I don't want to is even worse. Also, sucks from downloading from only 1 seeder despite it being a gbit seedbox in France. Only thing working for it is the ability to kick+ban the peer.
Deluge: 40mb of ram with 40 torrents is okay, and that's the max I am going to do. Can download at max speed from the same gbit seedbox in France even when it is the only seeder.
Unable to kick seeders is kinda putting off.