I ride both 168 UP, 169 Alp. The UP has a 20cm waist/ Alp 21.5
UP is a little stiffer but holds ice better. I use it in powder up to 1'.
Alp has softer tip floats better . I'm 5'6" 180 and have to watch the pressure on the tip on the softer groom so I don't fold the nose. The 169 would hold speed better, but 162 better for narrower trails quicker turns. I get high speed wobble on that short of board, but I ride wider longer runs. since you only get out 3-4 times I'd go with the UP162 work on turns and push it to it's limit .