c# or unityjava ? , Which is better? why ?

c# or unityjava ? , Which is better? why ?
I’m a little familiar with c # programming but Java seems to be more convenient, but are they the same performance as Java and c #?

start unity programiing with java or c# ? why

tankyou

This question has been addressed numerous times in the forums - please check there. UnityAnswers is not the place for questions of opinion. It is for technical questions with specific answers.