@wettek69 I can offer some experience here. Last year I was on a 67 inch Senate Graphite with Profile Bindings. Had some reasonable success. I weigh around 190 to 195. I decided to try a little bigger ski since I was in between the weight ranges. I upsized to a 69 inch Graphite Senate... same bindings. I felt like the 69 ran a little smoother for my weight than the 67 and was a little easier to get up on. Had more success this year... but a lot more reps too. I progressed from 28 mph to 32 mph. I had also bought a 69 inch CX superlite with xmax bindings at the beginning of the season also. I didn't try it until August. After only a few sets I started liking the CX better. I think it's a little narrower than the Senate. I felt that the 69 Senate was probably a little too much surface area when I progressed to 30 and 32 mph. On the CX I felt like the ski was a little smoother across the wakes and more responsive on the turns. So for me I felt like the CX superlite was a better ski. I did really like the xmax bindings too. I had had a couple times on the profiles where i didn't come out of the boot and it tweaked my ankle The xmax were comfy, very responsive and I ejected out of them with no issue. I will also say that I never went back and tried the Senate later in the season.... nor did I ever mix up the bindings.
Good luck with your choice. Both are great skis... as many on here will support!