I like the flexibiltiy of using both if I want. So I have a NATO stock and regular ones.
Which type of stock to use based on mags is kind of a wash. If you have a ton of AR mags. Then use them on the NATO if you don't want to buy a bunch of mags. But then again, if you're not gonna shoot a ton with your AUG. Buy the original and then buy 4-5 extra mags. You'll be fine.
You lose the bolt release feature with the NATO stock. But you gain a more traditional/extra magazine release with the NATO if you wanna go that route. You can easily run the charging handle old school. Which may cause pain w/ some rails and some optics. Depending on the situation. I run the charging handle personally. Just more used to it. Even with the A3 bolt release.
W/ the NATO stock, there is the issue, if you can call it that" with chattering on the bolt carrier from the bolt catch. That I really don't think is really an issue. But it can be remedied. I personally don't worry about it. https://www.ar15.com/forums/t_6_43/456965_.html
Just go with the stock option that works and makes best sense for you.