-1990-1994 intermediate housings are the same
-1995-2007 intermediate housing is the same
-SN and RN exhaust are different diameter. SN is smaller
-SN and RN pole brackets, poles different
-SN and RN steering cables are different
-SN and RN throttles are different lengths. SN cable is longer
-RN and SN pumps are the same
-You can run 61X electronics in a 62T motor as long as you run a 61X CDI, stator and flywheel. And visa versa.
I'm sure there is more but this is just off the top of my head.