Demo vs the retail The driving physics the same?

[Armo]

I tried the demo out and felt the rock climbing track was a load of fun but i hate the track with the mud. At first i hit the mud and doing like ive done irl i kept it punched with locked diff, locked trans, low tire pressure, and kept it in 4 low. No matter what combo of lock or tire pressure i was instantly stuck. Yet if i hit left and right on my keyboard zig zagging my vehicle i would never get stuck in any of the mud.
Needless to say this problem with the way the mud handles has kept me from the retail purchase. After a few youtube videos and reading the forum i cant help but wonder if its a flaw in the demo only or if infact the mud is the same in the retail. I also cant help but wonder what if anything(besides more vehicles and tracks) is different in the demo vs retail.