Board Thread:Manga/@comment-37224578-20181118220414/@comment-37493549-20181120015854

I think you underestimate the cart titan. It's very fast, never needs to rest, and can remain in titan form for months at a time. Its small size means it can operate in areas where other titans couldn't. 1v1 combat isn't its strong suit, but if the user is skilled enough in theory it can outlast all the other titans.

Also, it's not as if there's any inherent in-universe reason for the nine titans to have totally equal combat prowess. For all we know they weren't even designed for combat. If they were designed at all.