I may own both. Fortunately for me, my cetme (if I have one) was built by an individual who knew his way around steel. If you buy a cetme do it in person. Check the bolt, bolt gap (you'll need feeler gauges), fsb cant, and general fit and finish.
The front sight on a cetme IS adjustable for both windage and elevation, just like the saiga. The rear sight is graduated, again just like the saiga. You just need a special tool and a few rounds.
YMMV But just for good measure..........get both, sell one, keep one.