Is there a tier list of all precon Commander decks?
As far as I'm aware there are no official rankings for Commander preconstructed decks. However, each deck in a given set it made with the others in mind to be balanced against. Thus, Mirror Mastery is more likely to be balanced against Counterpunch than it is against Open Hostility.

Here is a list of sets, which each contain the decks that were in that set (and thus what they're balanced around). However, as you said yourself, Commander is a more volatile format and balance is not going to be a consistent thing. This is especially true when you consider that Commander is less competitive than traditional magic and more political/social. Consider Political Puppets. It certainly has win conditions, but the commander is based around giving your permanents away in order to play diplomatically with your opponents.

If you definitely want decks from different sets, in lieu of a formal ranking and because they aren't necessarily balanced around each other, I would look at the price of each of those decks. While certainly not a perfect way of telling, very powerful decks with highly sought after cards tend to be more expensive.