Not 2010 I'm afraid but some observations on the 2007 455. This was our first boat and we absolutely loved it. https://mariadz.com/2010/05/21/the-first-mariadz-dufour-455/
It also did a fantastic job when we went to dunkirk and were hit by a storm in the channel.
Recognise it isn't the most recent models but hope this helps.
Don’t know the particular model, but when we were looking circa 2015 we visited the factory.
At the time there were two distinct ranges - the Dufour (without suffix, or sometimes suffixed Performance) and the Dufour Grand Large.
The former were a bit more sporty, and we were impressed with the Dufour 40.
The Grand Large models were more charter / interior space focussed (and not my “cup of tea”) - more like an Elan Impression, for example. Worth checking things like ballast ratios, as at least in the smaller sizes the GL models were quite low in this respect (may be different at 450 size)
