Agreed, the only other high level technical striker Roberts faced picked him apart with ease. I love Robert but he has been out striking grapplers who are good put not great strikers, especially Yoel, but he has that game changing explosive power to make up for it.
Robert isn't as fast as Gas either and isn't as hard a puncher. I'm also not sure if his grappling is better than Gas's either and Israel's TDD looked pretty solid last night as did his scrambles.
Sure Robert could win but he's not likely going to wipe him out, fight could easily go either way.