well the ar6 and the chronic durability is the same, the ar6 is lighter i believe they are both really poppy the chronics a little more but they are also stiffer and harder to butter
because this years ar6 and chronic topsheets i heard were both bombproof but i know nxt years ar6 tops chip extremely easily. im not sure if it is a prob that they fixed already but i experienced that.
as to which is flexier, i would say the ar6, i have ridden both and that is my opinion.
and to me they seemed to have the same amount of pop, the ar6, maybe a little more.
i have chronics and they are extremely light, poppy, stiff, and durable. great ski, ive heard all the same for the ar6, just that it is a tad softer, but by no means soft.