I suspect you'll find that if you look through a top notch European rangefinder, Leica or Swaro for example, and even a mid-range American one (I have a Bushnell) you will be more than able to tell them apart, especially in last light.
I don't think ranging distance is very important providing they work to 400 yards or there abouts but even so from what I gather the European big names will range, even on relatively non-reflecting targets, to way beyond the distance my Bushnell will range a white painted gable end of a house.
For me, and my requirements, the advantages of the big Euro names just aren't worth the money but you can certainly tell them apart.