In semi auto only mode, I imagine it would be difficult to see a difference. I imagine they will make changes to various markets around the world to make them legal for sale there.
I remember reading one of the failings of western rifles was cheap M16 magazines... even the SA80 suffered from them, as they have very thin lips and any damage made them very unreliable.
In comparison the feed lips on an AK mag are thick steel, rather than thin Aluminium and would be rather more difficult to damage.
If they have any sense they will customise their products to the various markets to make them as desirable as possible. Of course one of the best ways to make not using standard M16 mags not a problem is to sell 223 AK mags really really cheap.
Of course buying decent M16 mags and then looking after them, I suspect they should be fine... Hunters don't die if they can't shoot every time, so reliability is not as important... unless you have a bear charging you...
I think that's just an error by the author. I don't think that's the safety.
I have looked really closely at that enlarged photo you linked to and it pretty much has to be it... there is no safety selector arm... I suspect it is a push through button... pushed in from the left is fire and pushed in from the right is safe so you should be able to push it through with your thumb of your trigger hand (right handed) to make it ready to fire.
The location (near the trigger mechanism makes it ideal for a safety and not so good for bolt release).
Note also looking closely at that enlarged photo you posted a link to you can see right through the rear receiver slot for the cocking handle... you can see the white background and the hammer in its raised (fired) position.
This tells me that the cocking handle must have an open slot on both sides so the cocking handle therefore can clearly be swapped from left to right as there is a slot down the receiver for it to move during firing... hurrah!
I suspect the metal guard above the cocking handle visible in the picture stays where it is and the rifle ejects on the opposite side to where the handle is positioned, so only one side is "open", which should reduce the amount of dirt and dust that can get into the mechanism with both sides of the receiver open for bullet extraction and cocking handle movement.
The 7.62x39 seems to have the most benefit in autoloaders in my eyes.
That is a common belief, but in my opinion that is not totally true.
Most rifles benefit in terms of weight and size by being made shorter. The 7.62 x 39mm cartridge allows a much shorter action, which means the rifle is lighter and more compact. The round does not rely on high velocity for effect so a shorter barrel does not effect performance in any drastic way but further adds to the compact and handy nature of the weapon designed for it.
The Aussies realised this fairly quickly, and their production facilities for producing Lee Enfield rifles were ideal for making AK calibre rifles because the 7.62 x 39mm round is actually a .311 calibre cartridge... exactly the same as the .303.
The result of adopting the 303 action (smooth and familiar to the Empire) with the commie round (compact and effective enough over shorter ranges) results in a very good little rifle that is cheap to fire as the ammo is easily available and cheap... unlike 303 ammo here.
You certainly can't hunt elephants with it... but the Zoo keepers in NZ get upset with hunters entering their parks anyway...

I just want a Russian rifle.