Replying to Wich Ski-length should I get (freeride)

Hello, at the moment I decide between the Armada Arv 116 jj (ul) and the ct 4.0 faction. Now I want to know which size to choose. I am 165 cm tall and weigh about 65 kg. In an articel I read that you should go up to 10 cm higher for an aggressive and fast driving style, based on your height. Both skis are available in 175cm. Is this length okay? Or which length is ok ...
I would really appreciate your help !!!

**This thread was edited on Jan 23rd 2019 at 4:37:53pm