I've just switched to the 360 and am feeling a bit iffy about it so far but one important difference for me is that there doesn't seem to be a way to record from or set a reminder for a specific channel at a specific time.
Take live football as an example - those programmes start with up to an hour of studio yakking before the kick-off and on the V6 it was quite simple to set a custom time (and reminder) so the box would switch to the game when the play actually starts, thus avoiding all the pontificating pundits.
I can't see a way to do this on the 360 so might it be a feature in future?