from what ive seen the mastermind is going to be a entry level park ski that CAN also perform all mountain but im not sure on specifics, we'd need a review.
but if your a more advanced park skier or just enjoy tearing up groomers, id shoot for the cronics
mastermind=cap chronic with a few mm more sidecut. They won't have as nice edge hold IMO, I never feel cap skis have as nice edge hold or lay down a groomer turn the same as cap. THey will be a bit lighter though. The cap also makes them less durable on rails. and like all line skis they will still chip alot.
but it mostly comes down to this: do you want the medium-stiff Chronic, or the less stiff mastermind?
I have found Line videos super persuasive though and they over claim.
I was wrong about the weight: 177 Mastermind=6.94lbs, 176 Chronic=6.34. how they got a cap ski to weigh .6lbs more a pair that is barelllly wider than a similar sidewall ski in a mystery to me.