Hawaii, if you are lucky, you get visibility of about 60ft.
Anyone who is a certified SCUBA diver would rate Cozumel far above Hawaii.
On top of that, Hawaii does not really have coral - the water around it is too deep for coral to grow.
Another thing about Cozumel is, it is drift diving - the sea current carries you and you "drift" - you start at point A, and the boat will pick you up at point B - diving boats at Cozumel do not anchor - for 2 reasons - the drift, and also not to damage the underwater environment.