It's not all that diefferent from LS. The planet doesn't blow up, but I think it was said already you can throw Kreia into the abyss once you're done talking to her.
Even though I play in the grey zone, going all out on a killing spree and being a jerk to those in your party can be fun. I didn't like either ending for the game.
Classic PC vs consoles.
All I'll say is I stick to pc gaming since buying games on multiple platforms cost money. Thats what I can afford to play is just pc.
How long a game lasts depends on if you do every quests/tasks in the game. I always do every quest in a game because of the experiance points/rewards you get and I like to prolong the enjoyment of playing the game.
I like the influence and it's a shame they didn't think of it for Kotor 1. Your actions be it good or bad should influence those around you. If you do something negative a good aligned character should complain about it.