I own a
Dufour 44 so i'm a bit biased. But here are my thoughts:
Dufour will be faster due to more sail area and better
hull shape. IMO the build quality is better and in your case it will be 6 years newer than the
Jeanneau. Also, i'm not sure how it is in the
Med, but in the States, there are very few Dufours but a ton of Jeanneau's, so you also get that novelty factor.
The only thing i dislike are the Sail Drives on our Dufours are the older 120 model, and they are a pain in the ass to maintain. They are designed to be hauled out for
oil change and zinc
replacements, though its possible to do it underwater, it's just a big hassle. And there's also the big hole in the
hull separated by a big rubber seal that
Volvo recommends is replaced every 7 years. However you gain the
fuel and
power efficiency, more space in the
engine room, and lower
noise and vibrations that a Sail Drives offer. Versus that Jeanneau, the Sail Drive would not affect my decision at all
Good luck!