This is the best resort in Finland (to my opinion, at least). The reason is that it is the largest, the slopes are longest and there are practically more of them. In numbers, there are more slopes in Levi but whereas there are 2 slopes in Levi, there is only one, larger slope in Ylläs.
More similar information, see my Levi tip in Sirkka and Pallas tip in Muonio and my downhill-skiing tip.
Equipment: See my downhill-skiing tip.