Here is a simple way to explain this much better.
This is comparing the differences of boys on-off stage:
On stage: Boys sing, dance, and nicer.
Off stage: Boys are mean, try and act tough, and try to be cool.
Well I hope I was a help.
This is just a simple way.
If you'd like I can go much more into detail.
Just message me if you would like more detail. :)