To discern is to separate. To notice that this, is not that.
To judge is to "say, by the law". And there is the rub, the nub: By which law am I judging?
I am not equipped or empowered to judge universally for others according to some group-agreed set of laws. Few of us are.
There is one judgement I can make: After discerning, and according to my rules for me - do I choose this, for me?