The 'Quickest' A-Body Small Blocks

Is this just your personal list based on deductive reasoning?

I am just curious how #11 .. 1969 Barracuda 'Fastback' ........ 340 4-Speed is noticeably slower than #2 .... 1968 Barracuda 'Fastback' ........ 340 4-Speed just as #7 .... 1969 Barracuda 'Notchback' ..... 340 4-Speed is noticeably slower than #1 .... 1968 Barracuda 'Notchback' ...... 340 4-Speed AND you have others like #3 .... 1968 Dart GTS ........................ 340-4-Speed #4 .... 1971 Duster ........................... 340 4-Speed
#5 .... 1970 Duster ........................... 340 4-Speed and #6 .... 1971 Demon .......................... 340 4-Speed in between them all.

Not trying to bust your balls. just trying to understand this.