10x
I prefer more mag for self spotting or seeing detail.
Sometimes I like more FOV than 10x provides.
Once I had a old SWFA fixed 10x MD with moa adjust, it went down the road asap.
Truthfully I'm rarely on 10x in the variables.
I can't think of any situation where I would want a fixed 10x???
I have a fixed 10x ss on my SAC 308 and run an AMG on my AX. Both rifles do the same thing but each has a purpose