Board Thread:Skyrim/@comment-124.177.144.5-20150618080516/@comment-26440657-20150618083036

There are several old threads about that here:

http://elderscrolls.wikia.com/wiki/Thread:832980

http://elderscrolls.wikia.com/wiki/Thread:836765

http://elderscrolls.wikia.com/wiki/Thread:294968

http://elderscrolls.wikia.com/wiki/Thread:282423

IMO Volkihar Clan is much better than the Dawnguard (Faction). You can become a Vampire Lord with the Volkihar Clan which has awesome powers but in dawnguard all you get are cool Dawnguard Weapons  and Dawnguard Armor which you can actually steal from dead Dawnguard members if you join the Vampires... I really don't see anything better on the dawnguard side except a few Armored Troll / Husky followers and a few purchasable upgraded crossbows or if you are roleplaying against vampires or if you hate vampires. Castle Volkihar has more cool things IMO. :D