By default, the two do the same thing but I want the hot corner to be set as overview and super key as application view.
I found some solutions like this gnome extension but it sets both the hot corner and super key as application view.
I also found a configuration setting:
gsettings set org.gnome.shell.keybindings toggle-application-view "['Super_L']"
It successfully set the super key to application view and the hot corner remained as overview but when I press the super key again, it opens overview instead of closing application view. So to close application view, I'd have to press ESC twice (first opens overview, second closes it) rather than pressing the super key again.