Help with Driver

First off, I am not entirely sure if this is the right place for this new thread... But I just decided to put it here b/c I think it fits here the best. Here's the situation...

I've been hooking my current driver, and Titleist 905T with a FUJI E-Fit On Stiff Shaft for about a year now. About 1 out of 10 would actually be good with the others ranging from a hard, barely controllable draw, to quackers. Its been very frustrating. I've spent countless hours on the driving range trying to fix it to no avail. Until this past weekend, I decided to hit different driver. The pro shop at the driving range was selling a Taylor Made 2009 Burner with a ProForce V2 shaft (i don't think it was the HL version). I smashed this thing. Most balls were dead straight to maybe a bit of a fade. At the end of the session, I started rotating the clubs in 3 ball intervals. This yielded the same results; I would hook the heck out of the 905T and hit the Burner really straight.

So my question, is the some innate difference between the two clubs that would cause such a drastic shift in ballflight, or is my body just reacting to the change in drivers in a positive way?