I like the 265DEH for towing at highway speeds, but for low RPM grunt, the 255DEH is better. This is the first I have seen the XE 4x4 cam. It has a little more lift than the 255DEH, but the stock heads don't flow much more above 0.450" lift.
Dyno sim gives the XE an advantage at 2000 RPM with 438 ft-lb torque, while the 255DEH gets 430 ft-lbs@2000. The 255DEH is a little flatter, and produces 298 HP@4000 RPM, while the XE has 297 HP@4000 RPM.

I think that the 4x4 XE is a slightly better cam, and could be much better with some head porting so the heads flow better at higher lifts.