My riding bud and me both had a 277w FTP last year.
He was 7kg lighter than me. But I'm notably more aero.
It was interesting competing With each on rides. No matter how we fought each other. We never beat the physics of it. The sad truth is that holding onto someone With a better w/kg, on a long ride is brutal. Even if you are more aero. You just cant steal the energy back on the flat.
Doing it wrong.