I've been on boats, as I'm sure most of us have, where even a two foot chop made the boat jerk and lose momentum and shake everybody up. And other boats, that just sliced through without complaint.
Boats that rounded up (and not because of trim errors) and
lost all
rudder control, because the
rudder was too shallow to hold versus a heavily heeled boat. Boats that can turn in their own length and boats that needed two or three boatlengths to do it.
To just say "buy a boat and go" might be very well for the
Bahamas, but if I were looking to buy a boat that *would* be needing to counter
weather and make long runs, I'd sure as hell like to find out how a few differed. You want to buy a horse? A Kentucky quarter horse and a Clydesdale are both "a horse" but you can't use 'em both quite the same way.
You can start by looking at EU category ratings, Cat1, the top, really still doesn't say long use ocean cruiser. You can look at PHRF ratings to see if one boat will get you into port a half day ahead of the other. Or various "comfort" ratings, or the sail area to
displacement (SA/D) rating to see if one or the other stands out.
And then there's the rig. One couple taking a boat anywhere overnight will mean each nightwatch is a solo watch. Can the boat be easily handled solo? Can it be easily handled with two? Or maybe, someone doesn't want to leave the
wheel to adjust
running backstays.
The OP may not be looking at these things, but they make huge differences. And pretty much can't be changed or improved.