If you're riding skateparks I'd opt for as slick as possible. Nobbly tyres will be slippier and really really slow.
The Tiogas will be best for parks, but 2.1" is a little narrow...I have a pair of 24" Shwalbe super motos in 2.3" and they are amazing in parks, pretty slick, good size and amazing grip on wood and concrete. They hate wet street though.