The 2.0 feels more stable, better in the rough and the rear is more planted. The 1.0 always felt a bit twitchy to me, not so with the 2.0.
One thing though with the 2.0, the shim-able rear diff will last longer, but only if you check the mesh often. If you set it and forget, it will wear faster than the 1.0 rear diffs.