The Mindbender 99Ti is more biased to hard snow, with less rise in the tip, a lower and more traditional tail, and a sidecut that lends itself to a multitude of turn shapes. If you are looking for a playful ski in the 98-100 range that still has power but you don’t ski switch, at least on purpose, I would suggest leaning this way.
The Reckoner collection is all new for 2021 with (my) expectation that the 102 will easily outsell the other two combined. The Reckoner 102 has a much more playful feel than the Mindbender. The longer rocker in the tip and turned-up tail, combined with a round turn shape, are the start of the differences between these two skis but it is the forward mount point that makes the Reckoner a ski that is very playful. If this ski were a girl, it would be Cindi Lauper because it just wants to have fun.