XMR vs 1000 XT parts myths???

So I was lucky enough to score a 2014 XMR rolling chassis (only missing engine) from a repo sale. I already own a 2013 1000 xt outlander. My plan so far is to transplant the XMR Rad on to my bike and go from there. I have a ton of questions for the gurus!
Are the diffs/axles/a arms and all that actually different? The rumor is that XMR diffs are built heavier.
I feel like the bike is taller. Would it be worth the effort to transplant the air ride fox shocks? Are the shocks taller?
What would y’all switch over? Or should I just transplant the motor? Never done it but how hard can it be??
Please help.. PS This is the extended frame XMR and I have a one seater XT. Doubt that the drive shaft fits anyways. But that’s just one more question