Definitely F.
C savers on most routes are not far off from F in the new chart - go for F

F experience is not jut inflight. It starts from the exclusive check-in annex next to T3, to the private passport control, The Private Room lounge, and then onboard where the quality of food is superior. And you are sometimes the lone pax onboard. In no way C experience is even close to this in these many other aspects.

In hard product comfort itself, the difference is about 20% I would say - wider seats, much bigger tv, no awkward protrusion at the side, longer pitch, no need to sleep diagonally, and softer padding.