Not sure what you mean by the profile of your bike?
What to you perceive to be the difference between trail and xc?
I would say a trail bike is a XC bike with slacker geometry that puts you in a less efficient but more fun position. Which may or may not have a longer fork.
Why do you want to change your bike is there something you can't ride now that you think you will be able to ride on a "trail" bike?
a trail bike is pretty much an xc bike. just 20 mm more travel. but really, theres almost nothing that you cant do on a xc that you can do on a trail. that said, all mountain riding is very different from xc