They’re two very different kendamas.
The Cherry Pro Model is great, the cherry wood give it a heavier weight and durability but the rubberized paint will chip off over time.
The aTack Complete is fun and makes some balance tricks super easy but it is just too sticky for me, doesn’t allow for any adjustment or slip.
If you want a kendama with a tacky finish I would personally go with the standard aTack instead of the complete - not too heavy and not too sticky.