Having a single engine (kicker doesn't count as a main) makes me slightly nervous. If you are looking at used, I'd go with the twin. New, either is fine, just stay on top of it, flush it every time, lots of people here like salt away.
Also depends on where you are/what you want to do. If you are east coast and need to go 50 miles out to get to deep water, yeah, I'd want twins. Ditto if you are chasing tuna where I am. If I go chase tuna, it's gonna be a 2 boat launch until I get comfortable.
BTW - when I started looking at grady, I wanted the 236, love the look of that boat. I got talked into my 228 because it was what the dealer had to sell. Walking around it is not as pleasant as a CC but you know what is super pleasant? Being inside that big enclosed helm when it is cold. If you are west coast or any place not warm, I'd look at one of the walk arounds. I've grown to love mine, can go out in a t-shirt when all the center console guys are in full foul weather gear. It's dry too.
It took me a while to warm up to that style of boat but I'm glad I got her, love that boat.