He might also care about service and support. Years of product surveys have shown LRjet to struggle versus Citation, for example. Why not spend a day doing a factory tour at each in Wichita? He (and you) may really learn a lot of things from each company beyond the power point comparison. For such a commitment, it may be worth it. I saw a cj4 a few weeks ago and thought at first it was a 45. It looked like a Lr/Cj offspring with it's wing sweep and heated windows.
http://www.flyingmag.com/pilot-reports/jets/all-grown-cessna-cj4
http://www.flyingmag.com/pilot-reports/jets/all-grown-cessna-cj4