I but a R1 with AR60 axles about a year ago. It is really hard to get the driveshaft correct as the AR60 has offset diffs and the chassis is very narrow to the point where the diff is almost parallel to the outside of the chassis.
Very fun to drive once I got it working. Super capable as well.
Looks like it would have more replacement parts than the Gmade. I had to stop using my Gmade R1 because of how hard it is to find replacement driveshafts.