Its hard to really say one ski is better than another, because most skis are good for different things. Thats like saying Line afterbangs are better than armada ar7's. They are two totally different skis. One is a perfect jib ski, one is a perfect jump ski. What type of park skiing are you going to be doing? 50% rails 50% jumps? or so on?
Having spent a long time researching the best 50/50 park ski for me i came to the decision of the volkl step. True symmetric, 10% nose and tail rocker, sintered base, toughbox construction (durable sandwich sidewall construction with small amount of cap), medium flex with carbon stringers for a super poppy feel. If i were to pick another ski it would be the atomic infamous but there is little between them.