The calibration tool used by Trinnov is more sophisticated and widely ranked as the top among the professionnal market. And also, I'll say there is a difference in reliability and quality of service offered by the company, at least in Europe - I can't speak for North America, maybe Emotiva has a top service there too, and I don't say that Emotiva products are not reliable, they seem to be well done and built anyhow - but I am sure that Trinnov products are reliable and that this company is quite serious, and this has a price when you're in the market for a top product. Of course, 17 K€ is quite a lot of money, high end products are always overpriced anyway even in the pro domain, but a lot of products come with more unjustified price tags than Trinnov.
Strange that few potential consumers seem to have a strong concern with reliability and quality of service in the hifi and video world. These criterias count among the most important when one have to make a purchase decision, IMO. When you buy a car, you don't want only a beautiful, comfortable, sophisticated, powerful one (if needed), but you wish also a car from a maker with a good service network and a strong reputation for reliability.
When you plan to buy an expensive speaker, amplifier or AV processor, don't you want the same ? Don't you think this is way more relevant than minor non audible differences in measurements or esthetics ?