It all depends on your use for it. The pistol scopes were originally put on ARs for CCO use, close combat and all serve the same purpose except they are better. If you are a gamer and shoot 3 gun where you are shooting big targets and never more than 100 yards they are good. Since they have the small 24mm front without a large objective they lose that natural sun shade and lose some light transmission if you are hunting in that last hour before dark. I am retired military and thought they were fine for close range military uses, but not now for my personal uses. If you shoot any distance at all you need to put them side by side with a hunting scope and you will see the difference.
Today, I use my 5 ARs hunting and just target shooting, I do not play 3 gun or other gun games with them. One of mine is a pistol in 300 BLK. While I do plink with the pistol and haul it in the RV when camping, I also have it set up for coyote hunting, and have the 3 x 9 x 40 on a quick detach mount as I sometimes put a reflex sight on it for 0-100 yards plinking or steel or for camping in bear country, 20 rounds of 300 BLK is pretty comforting at night in the boonies.
Coyote hunting requires at least a 9 power objective. Example, a coyote coming to a call that suddenly balks at 200 yards, his chest looking at you is about a 6 inch square, coyotes are short, maybe 2 feet tall, in the grass on 4 power, almost impossible to see. At 9-10 power that 300 pistol is good to 250 yards on a coyote, with the low power scope maybe half that.
If you do not hunt and only use them for killing paper at the range, I suggest the reflex or dots, there is not a lot to them, they are cheaper and if you are just shooting the center of a man target, not much quality is needed, as long as the bullet follows the dot consistently.
The other weakness I had with them is if you get one with a dot, or magnifier with a dot, they are usually up to 2-4 inches at 100 yards, that covers the coyote completely by about 200 yards, where you need crosshairs.
That is just my experience and what I use them for. Same scopes on the pistol as the carbines for me.