I’m the wrong one to ask I think. 
I just bought several to try, hence some in my BST, and started out to find my own preferences. But like yoyo they do change.
I started on a Catchy Street. Really liked it and even though it is oversized base cup and small cup I could land tricks on it and then quickly transition to a normal sized kendama so I’m not sure how much it was necessary now.
The natty’s, or complete naturals are still a challenge depending on the wood type. Until broken in they are very slick in my experience other than Ash. Ash it sticky then slick then back to more tack. Natty’s still help you dial in tricks though, but I would rather have a rubberized, cushion, or the likes 1st so you wouldn’t be so discouraged. But you may pick it up way quicker than me and slay a natty just fine???