I have both the Goldberg and Great Planes Cubs. The Goldberg was built by my brother and when he decided not to fly it I bought it from him. The GP Cub was partially built with the wings and tail group built and I had to build the fuse.
Now which do I prefer? After having flown both I prefer the GP Cub as it flew much smoother. Maybe it was the way my brother built it,( the Goldberg Cub) but it always seemed finicky when flying. Also the GP Cub has barndoor ailerons which are more to scale. Both lack flaps as do the real Cubs or as they are in more scale kits. The Goldberg is heavier because of the ply(Light?) fuse. However the GP Cub uses balsa it still comes out quite heavy.
MY Goldberg is hanging out in storage in the basement, maybe someday I'll put it back together. The one problem I had with the Cub I bought from my brother is he did not seal the fuse around the engine, now the wood is somewhat soaked with fuel.
Both planes do look nice in the air and are floaters.
Next time it will be either the Sig 1/5 th scale or the Adrian Page Super Cub. Both are much lighter and the Page Super Cub is designed for Electric power. Both are laser cut and the quality is very good. I would much rather spend a few dollars more to get a truer scale plane such as the Balsa USA 1/4 or 1/3 scale. They are very true to scale and make great projects .
Good luck with yours. jollyroger