Sport tracs are alot tougher then a Jeep wranger that is for sure, they may not be as capable of a wheeler right out of the box, but comparing the Jeep to the Sport trac brings up some interesting finds.
First off the Jeep uses a dana 30 front end and a dana 44 rear, these axles are WEAK compared to the sport tracs front Dana 35 IFS and rear Ford 31 spline 8.8.
The new Wrangler does not have the old tried and true straight six anymore, instead now I believe they have the 3.7L V engine from the Liberty? I am a not a Jeep guy so I am just going on here say here. IMO this is the worst thing that ever happened to the Wrangler, the 4.0L straight six made alot of torque. The sport trac will have the SOHC 4.0L Ford which makes V8 power and torque.
The only weak link in the sport trac would be the auto trans, but IMO its a good transmission.
The Jeep of course is coil spring 4 link front and rear and of course they are great trail rigs, but the Sport trac can be built up just like any Gen II explorer to give the Jeep a run for its money on any trail.
(pppstt get the ST)