One of them is dead on accurate and dependable.
But peep sights are intrinsicly easier to use and more accurate because of a longer sighting radius.
The SKS is not a great rifle for scope mounting. But if you can mount a scope on an SKS, they do very well.
The problem is the dust/receiver cover of the SKS should be taken off for cleaning, and that usually means taking off the scope and remounting it.
An excellent rifle for the price, I consider it a very good militia rifle.
No scope for me; iron sights/