Both have the 6.2. I am not sure about the towing package (I haven't gone far enough to identify individual vehicles yet, just looking at these models).
These 6.2's have quite a bit more HP, almost the same torque, and 2 more gears than the Burb I have right now, so I can't really imagine that the pulling power would be much less than what I have now, and with the upgraded interior, I think they would be much more comfortable going down the road.
2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
2003 Dodge Ram 3500 QC SB 4x4 Cummins HO NV5600 with Smarty JR, Jacobs EB (sold)
2002 Gulf Stream Sea Hawk 29FRB with Honda EV6010