I owned a Seafarer with the bracket(228G,) for 10 years. It had a single 250 Saltwater Series Yamaha, circa 1994.
I now own my 2007 232 with twin Four Stroke 200 Yamahas.
Therefore I can literally speak from experience.
The 232 is a MUCH better boat all the way around, as far as I'm concerned. I overnited on the Seafarer, and currently on the Gulfstream. Even if you don't, the Gulfstream will ride better, be more stable, and I think it's a more solid boat.At least my 2007 is...I don't know about past years.
Having twins is waayyy better than a single(again, for me, anyway,), and the extra beam is great..I turned sideways to scoot between the helm and passenger chairs on the Seafarer..No prob on the 232.
The only negative you'll have is the extra hassle of trailering with the wide beam, and since you won't trailer, it's a non-issue.
232, hands down, I think.....