I’m a bit relieved to hear you say the 12s were too shaky for you with offhand use, even with the forehead rest, as that mimics my experience with the EL 12s. As bad as I wanted to use the 12s, I just didn’t find the added power to offer me real-world value of higher resolution for my hunting style.
I spent a lot of time behind the NL 8x42 in comparison with my EL 10x50s and can say that FOV on the 8s will knock your socks off, but I did notice I strongly preferred 10x in the field. Still, neither optic is perfect, you’ll find some minor distortions with each if you’re looking for it.
Both pairs of optics were identical to me for low light performance, so I’m intrigued to see if the smaller exit pupil on the NL 10x42 has any negative affect, but I’m doubting it’s significant if so. I ended up ordering a NL 10x42 as I thought the 8s I tested were as good or better than the EL in every aspect which mattered to me. For my eyes, they’re the most impressive binocular on the market. As much as I love my EL 10x50s... they’ve fallen to the #2 seat, for me.