which one do you prefer?

Mach 1 seats. I did a 10 hour straight drive the other day and my body felt fine after getting out of the car. The seats keep you planted in. Never felt that with either of the two Fox bodies I owned.
 
The SN95 seat have it over any of the stock Fox seats by leaps and bounds. Even your '96 seats should be a far cry more comfortable than the glorified milk cartons that used to come equipped in the old Fox's.

My Cougar seats are more comfortable than both of them though. :D
 
Fox seats suck!! I just sold mine out of my '88 and am now looking for some 99-04 seats.

I honestly love my '03's stock seats. Just today i went on a 3 hour drive and was comfortable.

I think the 94-98 seats are a tad bit more cozy than the 99+ GT seats
 
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I don't know, my old '89 GT had the seats that would wrap around the sides of your legs and back with the turn of the knob. Plus, it had the piece to pull out to support your legs under your knees. They were pretty damn comfy if you ask me! But I do like the leather seats in my '02 as well, so :shrug: .