To wit, last year, I sketched a a bunch of the various logos for my future reference, and yours too, now.
2nd row: Fleischer cartoons shield, Man of Steel shield
3rd row: Superman Returns shield, 90's electric Superman shield
4th row: New 52 shield (in 3D), Post-Crisis on Infinite Earths John Byrne shield
Bottom row: Superman Earth-1 shield, Kingdom Come shield
And knowing is half the battle.