You are right SAS but - as mentioned before, the client prefers the cabin layout of the 350 and is in an area with little 407 support but with good 350 support (as in service centres).
At the end of the day I must present a factual report and that's what I'm trying to achieve. The 350 (series) has far more flight time than the 407 - unless you throw the 206 pedigree behind it.
After I present the facts it will be the client who decides but yes, he has asked for a recommendation at the end of the study but I still don't have all the facts together (yet) but I soon will have. At least enough for this exercise.