The Catamaran provides plenty of comforts on a stable platform where you can stare at the beaches while you cook.  You'll have berths with windows looking into the ocean and plenty of areas for sun bathing.  If you prioritize comfort for adventure, the catamaran is for you.

The monohull is the traditional sailing experience.  You will feel the tilt of the boat (or heel as we call it).  The waves will splash over the bow and you'll feel the boat accelerate and decelerate with the wind.  You'll slice through waves and spend more time sailing.  If you prioritize adventure over comfort, the monohull is for you.