I have built/altered houses using both.
I have found over the years that the European brands last FAR longer than the ordinary cheaper ones.
They are built to last whereas others are not.
The technology is usually better, they are quieter, and made of better quality materials.
However, they are often, double the price.
I currently have a lot of Neff products built into my kitchen and they are brilliant.
Things like ovens that clean themselves, combination cooking with micro and oven, which I use all the time -there is no tray on the bottom that goes round like ordinary microwaves, and heaps more.
The dishwasher and wahsing machine, you need to look to see if they are working (apart from the spin cycle) and I just think they are far more advanced -but then again for the price, they ought to be.