Hello new here

I'm considering getting a pair of these but not sure on the size.

I currently have a pair of thee 666 XHS size 34. the fit is perfect as far as look.
little tight in the hips. but I have plenty of room in the waist.

Would anyone be about to help with what size to get in the 777 XHS?

I was thinking a size 34 in the 777 XHS because i still have room in the wiast of the 666.