I think Johnny Carter on the YOUTUBE channel TGS did a video of him shooting at Orvis and using the G1 you are talking about. You can watch that video and get his reaction to using it.
At my Gun Club they actually have a Super Bird in the gun room at this time. I would say, Yes, it's a supped up version of the RBL. I will say it seems to point good when mounted. Have not shot one though.

Mike Proctor