Some immediate changes between mine and the RR that I notice are notable improvements. My kit came with the motor box you see above. It had provisions for a few different motor choices including electric and it had to be assembled. (The electric and 160 motor box were the same). The RR already has this pre-installed.

My chin cowl and chin cowl had to be cut for the landing gear to clear, this is predone.

The chin colw is mounted to the plane via blind nuts preinstalled. I had to install wood blocks and use wood screws all around to hold mine on.

The gear provided with the RR looks to be longer (but cant verify that).

The covering though still doesnt appeal to me. Just a personal preference. I pulled mine off of the wings and tail group and plan on recovering one day.