How to create different Panels for Add and Edit node? There is a default "add/edit node" panel inside the Pages content.

When I use it, it utilize the its variant for both add and edit forms.

I would need to differentiate between both of these two instead of having a common panel for both of them.

Do you have any solutions?

(My Drupal version is 7.x)
On the node/edit panel, create two variants, "add" and "edit."

Make sure the add variant is first.  Then add a selection rule for the add variant:

String: URL path  node/add/*

All paths not meeting this condition will be sent to the edit variant, which should 
give you the effect you want.