What is the difference between the McLaren 720S variants?

The 750S is approximately 30 kg lighter than the 720S, thanks to lighter seats and wheels. For buyers considering the McLaren 720S, that matters because it affects how easy the car is to live with, whether for commuting, family use, long-distance driving or ownership costs. The useful way to read this is not as an isolated specification, but as a clue to how the car will feel in real daily use.