When did megadeth become better than metallica?

I think megadeth has been better than metallica from their inception.Look at it this way,Dave Mustaine wrote 6 songs on metallicas first 2 albums.Thats one third of the music on metallicas first 2 albums Dave Mustaine wrote.Killing is my bissuness is a rock solid underated album thats better than kill em all.Everybody says megadeth didnt p metallica by until countdown to extinction and yes its true megadeths 90s work destroyed metallicas 90s work,megadeths 80s work also destroyed metallicas 80s work.Peace sells is better than ride the lightning,sfsgsw is better than master of puppets and rust in peace is better than justice for all.