The 6 speed auto is a massive improvement over the 4 speed auto.
I have 2 BA fords, one XR6 and a Fairmont Ghia.
All im going to say is get the leather and sunroof, our Ghia is so loaded compared to the XR, the XR is just a base model with a body kit.
I think the FG XR6 is much more loaded with goodies compared to the BA XR6, much closer to the BA Ghia options from what ive seen.
Have a read in the link below for the brutal truth.