The Seafari always looks its smiling.
The overnighter looks a little more frustrated.
I have only seen the picture in Overnighters avatar so I can't give you any real info.
I appears that the cap is more like the MA with the cuddy and walk thru windshield a little more forward and a raised forward sliding bow access hatch, rather than the aft hinged bow hatch on the Seafari.
I looks like a very functional adaptation.
Look forward to the pics.