If you implying the T-6 is a worse choice because airlines value one type of fime over the other, a couple points..
First...student time doesn't count much anyway...
Second...both are turbine....
If you are worried about single verses multi PIC, then pick the F-15 C or E over the F-16, or go to an A-10. Realistically...military fighter PIC turbine time is interchangable when it comes to applying to the airlines. In any case--focus now on GETTING WINGS, not logging particular types of flight time.
Now...if you comparing one trainer to the other, I found the tweet uncomfortable, loud, but very exciting to fly. I've heard raves about T-6 performance, but I haven't flown it yet. Not having an IP so close to me on my right side, however, is appealing, and the tandem seat arrangement appeals to me personally.
So...go to Sheppard if you are 95%sure you want a fighter. However...I flew fighters my entire career, but I had a blast in "regular" UPT and still got lucky enough to get my dream job. If you aren't sure...well...if you think you might be happier in a C-130 or a C-17, you might consider the other bases. Where ever you go--just work hard, have fun, and good things are likely to follow....