They're not the same thing:
Personal story - a unique over-arching plot for each of the 8 classes
Dialogue trees - outcomes of events change depending on what you respond which is different than a cut scene where nothing you do matters
Fully voiced everything - yes, that's related but it could have existed without the dialogue tree and they could have done the dialogue without the voice acting. The acting is a huge part of the game.
Companion characters - this incorporates a lot of things, you can have them fight with you, you can also control them, you can equip them how you like, you can have them craft, they have their own stories and personalities, keeping them happy is also key to how well they work for you etc
You can change the appearance of one item to another in WoW but you can't do it the same way you do in TOR. I personally haven't played another MMO that lets you mod a piece of armour with any different combination of stat modifiers in the same way that TOR lets you. I'm not sure what you meant by end gear being purple, you can have purple modifiers in armour. Anyway, if similar systems exist in other games it doesn't change the point that it's not in WoW. You said it was a carbon copy of that game.
Anyway, clearly you see what you want to see, others see it differently.
Purple gear has baked in stats, it has mods as well, you can strip the mods, but you can't put the baked in stats onto another piece of gear. IE: my Champion pvp gear, has no armoring in them. If I took the mods out and put em into orange gear I liked I would be boned without armoring to match.
Personal Story is fine, but dialogue trees? lol? outside of your personal story, these have ZERO effect on anything, they can't so Bioware made sure they didn't.
This is an example of a "dialogue tree" for any random non-class quest in the game:
"Oh hey! You're the great (Havoc Squad/Jedi/Scoundrel) I've heard so much about!"
"PLAYER CHOICE: Go fuck yourself"
"Hey, don't be rude to me dickwad!"
"So yeah I need you to help me kill a womp rat"
"PLAYER CHOICE: Womp rats are dumb and so are you"
"I'm not dumb you are!"
"The womp rats are over there, thanks bye!"
QUEST ACCEPTED.
holy shit, that's some amazing fucking choice right there. I really feel my decisions impacted the quest.