What do you mean by the f1 can ride the whole mountain? Do you mean the park as well?
Other way around, I meant that it will handle the very difficult terrain effectively, but isn't too high strung to let you relax when you want. Emphasis is on the part about the Premier being more forgiving to small mistakes. The Titan is great when you can open it up or hold a hard edge, but on the flats where you need to flatten it out at a lower speed I've often had them get a little bit squirrely on me. I'm just as likely to bust my ass on an icy cat track traverse vs. double black when I ride that board. Like I said before that's probably because I can get lazy and a bit out of balance in boring spots like this, but the affect is not nearly so great when I ride my T5.
What about jump turns through really steep mogulyish stuff?
and how does it pop off cliffs and natural lips? No park stuff I know
The issue of things like jump turns in my mind goes back to what I was saying about hard speedchecks. If that edge hits firm snow at a high angle it's going to grab so you'd better be able to quickly transfer the majority of your momentum into the direction that the board is pointing. Unless you're riding pow, turns with this board need to be more about carving than anything.
I don't pop much off jumps so I can't really comment there other that to say that I can't really tell much difference between these boards when jumping/landing.