Many people say that the harp is more difficult to play than the guitar. It seems to me that the opposite is true since every string on a guitar has many frets, say 15, so 6 strings * 15=75 notes which of course aren't distinct. So I assume the harp is easier to play but the only difficulties is that the harp is more expensive and there's far less tutorials on harps than on guitars.
Which is harder to play?
Also, what's the difference between a small harp and a qanun? It looks like the qanun is just a horizontal harp.