Replying to ON3P 181 or 186?

Whatsup NS, just a little info about me. I'm 6'2 200lbs and a really aggressive skier who likes to go fast and go into the trees for some tight carving and fresh snow. I'll take the occasional park lap but for the most part I'm looking for a stable all mountain west coast ski that can shred groomers or a foot of fresh!

I decided on the Kartel 108, I just can't decide what length to go with 181 or 186. Obviously longer is more stable at high speed but what about skiing tight tree lines and park use?

Will the 186 be pretty much the same as the 181 at high speeds? Because I'll go 181 if I can get away with it. I guess I'm just hesitant to go longer because I've skied a 179 my whole life (but I was also 170lbs not 200) maybe I'm missing out on the longer skis.

Any remarks would be appreciated