what is the difference of a ford explorer sport trac and an explorer that's not a sport trac?

Basically they are 2 different body styles.

The Explorer is a 4 door SUV with an enclosed cargo area in the rear.

http://www.fordvehicles.com/suvs/explorer/

The Explorer SportTrac is a 4 door SUV with a small pick-up style bed in the rear.

http://www.fordvehicles.com/suvs/sporttrac/

Note: fuel consumption will vary depending on which powertrain you choose. Both vehicles are available in 2wheel-drive or 4wheel-drive & both vehicles have the options of a V6 or a V8

Here are some comparisons of just a few of the powertrain configurations.... you can change the comparisons for more detailed information

http://www.fordvehicles.com/suvs/explorer/compare/...

the sport trac has the pickup box and these are really good vehicals, if you want the sport trac for a box they don't hold much good for taking some stuff to the dump.there is nothing wrong with either of these trucks

EXPLORER'S are mid-sized SUV's. SPORT TRACK'S are the pick-up version of the Explorer. Average gas consumption is 17MPG. Compare the difference on yahoo! autos