It's a Trekker - I'm almost 100% sure. The reason I know is that our LBS bitd had a job lot of Tufftraxes in and loads of kids were riding around on either Red or Yellow Tufftraxes - my neighbour (who fancied himself a "cut above") decided to splash out on a Trekker so he didn't look like everyone else!
Oh, and if memory serves, the main difference between the Tufftrax and the Trekker (apart from colour) was groupset - the Tufftrax had Exage Country and the Trekker had Exage Mountain (I couldn't read the small print on your thumbies)
Bikes: '92 Alpinestars AL Mega DX, '93 Cannondale M2000, '94 GT Zaskar, '90 Saracen Tufftrax (Pink!), '9? Raleigh RSP Team Edition 853
Projects: '89 Muddy Fox Courier Comp , '93 Raleigh Apex, '92 Cannondale M2000, '91 Scott Boulder, '87 Raleigh Ozark, '89 Raleigh Avanti, '87/88(?) Marin Palisades Trail, '91/92 Saracen Conquest E Stay, Unknown Saracen (1994?) Frame...