How's your math?

[MartinR]

That goes for same size yachts.

Of course, bigger/heavier is always more comfortable

There is a reason I have a long boat.

[GordMay]

It isn’t really possible to quantify all aspects of a boat’s motion in a single numerical parameter. But there is a relatively simple so-called “Comfort Ratio,” developed by designer Ted Brewer* (somewhat in jest), that does provide a reasonable indication of what a boat’s motion will be like in certain conditions.

Comfort Ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam↑1.33)
where displacement is expressed in pounds, and length is expressed in feet.

And where:
numbers below 20 indicate a lightweight racing boat;
20 to 30 indicates a coastal cruiser;
30 to 40 indicates a moderate bluewater cruising boat;
50 to 60 indicates a heavy bluewater boat;
and over 60 indicates an extremely heavy bluewater boat.
If evaluating a larger boat, say 45 feet or longer, expect your results to be skewed a bit higher on this scale; if the boat is quite small, say 25 feet or less, they will be skewed slightly downwards.

The Mirage 25 has a Motion Comfort Ratio of 15.13.
The Olson 25 has an Motion Comfort Ratio of 10.65
☞ Sail Calculator Pro v3.54 - 3200+ boats

* ☞ https://www.tedbrewer.com/yachtdesign.html

[Drinky Crow]

So to further muddy the waters there's also an S2 7.9 I eyeballing.
Almost as fast (168) as the O 25 (162), almost as heavy (4050#) as the Mirage (4400#).