they are close in style, but there are still too many problems...mainly the left facing bust (unofficial coins frequently have retrograde elements). Also look at the hands of the soldiers on the shields, very long and like claws. Remember Occam's Razor - all things being equal, the simplest explanation is probably right. In this case, the simplest explanation is that the coin is unofficial, though in good style. You might find a few official coins with some of the same styles, as I noted earlier, official mint employess might have been involved in the minting of unofficial coins.