I would expect one to only notice a difference on a dark night. And then only if one's eyes can see anything under such conditions. I found this valuable very early one morning on an elk hunt. Prevented me from spooking a herd of cows and two spike bulls.
I like the additon of the super hard lense coatings and the up graded dials on the 6X42. Last I heard, these were not standard on the 6X36. E
Most of us over 50 don't have pupils that will dilate much beyond 5mm, let alone the 6mm of the 6x36, so there's no actual way the 6x42mm's 7mm exit pupil could in any way be of an aid. None. To be a scope that makes any kind of sense for most of us, the 6x42 should really be a 7x42 or 8x42. That would be a scope I could get behind.
