They both are good depending on your other heroes and the way you like to play the game.

@OP:

If we talk about jonin or edo minato then he works quite well together with madara 5ks, if we talk about hokage minato then he works good together with edo itachi.

Shisui works decently with edo itachi and poorly with madara.

Six paths naruto works fine with both.

The real question is: are you a blind move 1 overstacker that cares nothing about the other moves?

Then madara is your choice.

Are you a spreader that tries to make his move 2/3/4 not inconsistent too?

Then get edo itachi.

That said, they actually work fine together too in the sense: madare 5ks, edo itachi, naruto six paths is a solid team to run with wind, water or earth main.