They are better weapons.
Arsenal Inc. (Nevada) has spent a fair amount of money to build the side folding stock and the fit and finish are far better than most AK's. They also have more USA made parts so you can use foreign made magazines without worry. Are they more reliable? Since most AK's are EXTREMELY reliable I'd say they are as reliable as they should be, you sometimes ger WASR's that choke, but most AK's are extremely reliable. Are they more accurate? Probably a little bit, but the AK isn't a tack driver anyway, if you want to punch tiny little holes in paper - buy an AR.
There are plenty high dollar AK's out there, Arsenal Inc. isn't alone, but they are pretty proud of them.