As most here, I have no experience in small boats in Grecian waters.
BUT I have seen RIBS absolutely take a whale of a beating and never flinch. Seems thay are ALL built with sturdy wave flattening rigid sections and the inflatable portions keep human bodies from breaking bones as you are tossed around inside them. RIBS also offer a comfy gunwale to sit on.
Small Bayliners (at least in the US models) are not intended to see continuous use in waters that will keep them tossed about. I have no idea if they offer some non US models for harsher water conditions, but that may be the case.
In all honesty, for the world of small boats and hazardous waters, I feel that a Boston Whaler or equivalent knockoff can't be beat. They offer the most solid and reassuring wave bashing ride in a small boat and of course can't be sunk.
* Actually you can beat them quite soundly, and they will keep coming back for more. *
Good luck and welcome to the wide world of boating.