I'm amazed that, as soon as the leg grabs were LIMITED(not removed!) from judo, people started comparing it to greco with a gi. Guys, there are still leg throws in judo, and even with the limited leg grabs, judo is still more versatile in throws than greco.
If a guy adapts his judo to no-gi, he will fare better than his greco counterpart, IMO. The adaptation is the biggest issue.
"He who defeats himself is the mightiest warrior" - Confucius(I think)