Kuiu! Extremely comfortable and lightweight. I am a minimalist and can fit my 10x42s plus a lens cloth and a waterproof cover. I don't need/want anything else in the case as its added weight. I can't comment on the AGC as I have never used one. I have seen it and it is a bit heavier than the Kuiu but it also has more pockets for additional items. Lots of positive reviews for both.
I used the "minimalist" AGC on the sheep hunt. It was perfect because it has an elastic pocket on top that your cell phone fits just right in. Got lots of photos I never would have taken without it being so handy. Also has a very minimalist zip pocket on the bottom I didn't use and two little mesh pockets on the side. I kept Cat Crap anti-fog in one and didn't use the other.
For just hunting here in Texas I don't use it, just a CH strap.