IMO itâs a mistake to focus on optical quality differences, which are minor (all things being equal, which the above post isnât). In normal use (ie typical daylight situations) with modern premium 8x32s thereâs no meaningful difference in handheld optical quality (ie handheld means youâre not going to benefit from any theoretical increase in ultimate resolving power).
The difference to be focused on is COMFORT. In my experience that is a much more noticeable real world benefit of the larger exit pupil than the âraw optical qualityâ difference (if any). After extended use the larger exit pupil eye comfort advantage increases (less eye fatigue, less fidgeting to find proper eye position etc). And on the flip side of course the 8x32 has comfort advantages for nearly everything that doesnât involve your eyeballs (smaller and lighter), and with extended use the neck / arm fatigue advantage compounds in favor of the smaller bin.
Itâs up to your priorities and uses as to which makes more sense. As someone who owns a premium 7x42 and 8x32, and has tried many others, IMO a good modern 8x32 is more than good enough for the vast majority of people and uses. Iâm currently in the mountains in central Mexico and took my 8x32 Meostar and left the 7x42 Ultravid at home for this trip. I knew I wasnât going to be doing any extreme low light birding (plus few potential lifers on this trip) so it was an easy decision; the size/weight savings was more important than the slight increase in viewing comfort and optical quality, and itâs also lower profile when wandering around populated areas. If I was going somewhere with lots of poor light and lots of tricky lifers, I probably would have taken the 7x42.