Grey Market 'Euro' 308's

I am interested in purchasing a late model 308qv; the question: If a conversion has been done well and all records are in place what are the downsides of a 'Euro' car? Are the parts different, is the maintance schedule different, will a Ferrari dealer work on the car, are there different fuel/oil requirements, etc.? Additionally, is there an accepted discount associated in purchasing a Euro car? Thank you in advance for your response.