Gold Wing engine to Rotax engine..no contest..118HP, 125 ft lbs TQ to 100 HP, 80# TQ....the math has already been done.........but............
An RT vs Gold Wing Trike calls for an MCN shootout!!
Having owned 3 1800 wings, one of which was attached to a CSC trike kit, I can tell you a trike feels underpowered compared to the 2 wheel version.
The SM5 we demo'd, and almost bought, did not feel underpowered compared to the trike.
Shootout time......RT vs GL1800 trike (preferably IRS version)