Terms of reference Fax? I agree Sebring is a far better race to actually watch, even if it is only half as long. That much is indisputable. The LMES at Silverstone and probably all the other curcuits used in ALMS and LMES are better than Le Mans from the speccys point of view. 
As to it being a better "event", I'm not so sure. Le Mans is a much bigger event in terms of spectator numbers and probably the atmosphere is more charged. The race start is more dramatic, or at least was, except now they gone and stuck the stupid effin chicanes in at Dunlop. On balance, I reckon I agree with Lee, they're both best.