The two will turn the same on the trails because the articulated rear skid will act like tipped up rails. The Expy sport has a deeper lugged track and more track for going off trail, but not too much lug for on-trail. Plenty of people chose 1.5" lug or more for 90% trail use.
The articulated skid also gives you a chance at backing up off trail. Without it, better not plan on going anywhere in reverse other than on hard packed.The second seat on the Expy also means you can take someone with you without blowing a ton more money on a new seat, and as mentioned above; lets you pull off the second seat for tons of cargo room.
The only things the Renegade has going for it is r-motion, shocks slightly and I believe the option for the molded in lug studs.
The 42" wide ski stance vs. the 38" ski stance can be a plus or a minus. It depends on how much you are off trail.
Basically; if you'll be pounding the trails, get the Renegade (I like the Enduro that comes with air-ride and lug studs) if you'll be off trail 25% or more, the Expy starts to look a bit better. At 50%, it becomes a no-brainer. Lets not forget that the Enduro (I know, not one you are looking at, but I love air-ride) also cost a bunch more than the sport, but the Adrenalin comes in slightly cheaper than the Expy Sport (I'd call the difference insignificant at the cost of these machines).
If you think you'll ever want to ride 2-up, any cost savings with the Adrenalin way more than disappears. I purchased my sled just for me, but find I have a passenger about half the time.