Neither. Get a men's ski.
The last time one of these threads came up, asides from mentioning men's options, the ARW seem to be the favorite for women's park skis. Because of this I decided to take a closer look at that ski when I was at my local shop. That ski is NOT symmetrical. If you flex the corresponding men's ski the AR7 you feel the same flex pattern in both the tip and tail. The ARW on the other hand is considerably stiffer in the tail, this is something ski manufacturers do to entry level skis because they know bad skiers are going to be backseating more so they need the ski to be stiffer in the rear to compensate. But the ARW is supposed to be an advanced ski...
You may be asking what this has to do with your Cantika or Empress choices. Well this is just more evidence of how manufacturers like to dumb down their women's skis. Basically they assume women are going to be crappier skiers, so they build the skis accordingly, not as symmetrical, not as durable, basically just shittier versions of their men's lineup.
Most women who can shred have learned this early on, it was just especially apparent to me when I was in the shop the other day comparing skis. If you can rip, make the switch to men's skis and don't look back. Personally I'm fond of the Atomic Punx and K2 Recoil for park.