Both the Ontario and the Royal George were built by the same master shipwright Jonathan Coleman. He was a trained shipwright and served in the Royal yards in England. Both ships seem to have the same style and I would think the same construction. Both were armed transports built for lake service, but it seems the design of the R.G. has a slightly more bend towards a fighting ship a little lower profile and a third mast. Sterns and body plans look very close. I have CAD drawings of both ships in my archives than can be used for plank on frame or plank on bulkhead models. I am more than willing to share whatever research material and drawings I have