Everquest 2 vs. World of Warcraft
Gamespy has a piece up today comparing and contrasting the feature sets of Everquest 2 and World of Warcraft. It's a pretty thorough story, covering the newb experience, combat, character customization and more. From the article: "In one corner, you have EverQuest II, the sequel to the undisputed heavyweight MMO champ EverQuest, the game that has probably caused more divorces than any other video game in the world. In the other, you have the challenger, World of Warcraft, the first MMO created by Blizzard Entertainment, the development house best known for StarCraft, Diablo, and the original Warcraft RTS games."
I didn't get too far into the beta (level 15), but the feeling I got is that it depends on the class; blizzard seems to have designed the classes so that some work well for soloing (especially the ones with pets) whereas other are better as parts of groups.