Battle of the decade! (Early 70s knockout round) - 1971 vs 1973!

[Slime]

We have come to the knockout round of the "Battle of the decade"! (Early 70s)

 

Sadly, we must say goodbye to the lowest vote getter! 

1972 had some votes, but it just couldn't hang in against such fierce competition. 

We still love ya, 1972!! 

 

Now the one on one matches commence!

 

First up, we've got a battle between the top vote getter (1971)  and the scrappy underdog (1973)

1971 dominated the preliminaries, but could 1973 pull off an upset here??

 

Which year wins this battle??

 

Have at it!

[Nova Carmina]

1971, for all the same reasons I articulated in the first round, starting with Aqualung and going through to Zeppelin IV, Led