In Le Mans teammates should be the best budies and together they should be the best unit. Take one driver out and put the next one in and you can be confident that he brings the car home in one piece as you would do. And he is quick, as you are. But he is also the next competitor. Both use the same piece of hardware and the same setup.
But remeber, when you look at these pictures, that laptimes can be influenced by team order, by fuel or race strategy or tricky weather conditions. Doing it a bit slower can be way faster at the end.