I would argue one person is always more naive than the other even in same-aged relationships. It's almost impossible to find someone exactly at your own level when it comes to maturity, naivety, intelligence etc.

I would argue that power imbalances always exist. Someone is always richer, smarter, more mature, physically stronger etc. Even having a better support network could work as a powerful tool in the hands of someone with ill intentions.

Don't power dynamics exist in every single relationship though? Someone is always richer, smarter, physically stronger etc.

I know that my relationship is healthy for many reasons. (he has actually encouraged me to advance my career and be independent). I just worry about potential backlash from third parties.