Now there is a man who knows suppressors!
Muskox, your point about the Euros making better suppressors because they have been doing it longer is 100% correct. Not only that, they are cheaper there too because they are not considered 'special' like they are here. The only reason they are special here is because the ATF regulates them. Which leads manufacturers to charge huge sums for bits of pipe with baffles in them.
I've owned an Ase Ultra when I lived in England, it was the single most efficient suppressor I have owned and it was cheap too.
Modern 'good' US suppressors for some reason are just not at efficient (advanced?) as Euro items. Look at some of the tiny cans on the UK gun forums, and they have better suppression than your average can here!