The Europeans generally don't do as good a job at suppressing internal stray light reflections as does Leupold. You'll see this yourself if, while looking through the scope, you point it close to the sun - KEEP THE SUN ITSELF OUTSIDE THE FIELD OF VIEW! - or another bright light source. This simulates taking a shot into the sunset or sunrise, or across a snowy field on a sunny day.
Also, the Europeans don't generally offer as much eye relief, which might be a factor on a .375...especially if you're shooting uphill, or from an awkward angle in the field.
The European scopes mentioned should be very good optically, but remember, part of what you're paying for is snob appeal.