There is no difference between the Type Rating course. None. The price difference is because there are two sepaerate governing bodies, i.e the JAA and the FAA. Say that you are a European JAA pilot and you wish to save 15.000 euros on a B737 Type Rating by doing it in the USA. Even if you did your Type Rating in the US at a FAA and JAA approved center, the testing center does not issue you the license. Yes, they may be JAA approved in the USA, but that is not the end of the story. In order for the JAA to protect business they made it mandatory that there are certain maneuvers that must be performed in the actual aircraft...back in Europe. So, if you are not part of an airline then you will have to rent a B737 and do a couple maneuvers to satisfy this requirement. Could the maneuvers be performed in the sim back in the USA? Oh, hell ya. But it's all about the paperwork. And there is not one Type Rating School in the USA that will issue a license, issuing the license is the responsibility of the CAA of in whatever EU country your license was issued. This is unlikely to change because European TRTOs to a good job lobbying to government lawmakers who know nothing about aviation.