I think you're looking at it all wrong... Your GB500 IS a pretty retro-bike... very pretty. But I also think the Borile B500CR is ALSO a very nice looking bike. Different, but nice. I don't think it was meant to look like a faithful reproduction of retro bikes, but more like a modern interpretation of what was good about the old bikes: Their simplicity, light weight, high fun factor, etc., and I think Umberto Borile did an outstanding job of capturing that in a modern package.