If the Max is sufficiently powerful for your needs than it is a better value than Ultra, since even if the latter gives you more x/$, that doesn't really matter if the additional x you are getting is unnecessary.
Analogy: if I need 800 calories for dinner but the restaurant has a "supersize" option with 2400 calories for only twice the cost, the regular option is still better because it provides the proper amount of nutrition instead of making me fat for twice the money.
Analogy: if I need 800 calories for dinner but the restaurant has a "supersize" option with 2400 calories for only twice the cost, the regular option is still better because it provides the proper amount of nutrition instead of making me fat for twice the money.