2015 900S vs. XP1000

So I’m going to be new the RZR world soon and wanted to pose this general question…

Most of my riding will be trail type riding..ie.. Brimstone, Windrock, Hatfield McCoy….general driveway snow plowing when needed…

Would I be better off with the 900S or the XP1000?? I’m sure the 900 has plenty of power as I watched plenty of 800’s do Brimstone and HM…

Thoughts??