it was obviously much better for me
...in the set up up it was in at the time...
I am not having a go, but you made your choice based on the way the shop set the bike up. There are so many variables in bike set up, that who can tell whether you wouldn't have preferred the Trek had it been set up properly for you.
You also say that as a ''new'' rider you cannot look at geometry. I would respectfully add, that as a ''new'' rider, you are probably not equipped to evaluate how a bike rides either...