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you have 2 points of failure, with your 2 safes. If one of two bank decides to deny the safe access, your family got screwed.
please keep it fucking simple by engraving the seed into a sus316/titanium plate, then store them behind/below your home safe, for the following reason:
* engraving into sus316/titanium means your seed phrase stay safe from natural disaster like fire, water, acid, …
* store them behind/below your safe keeps the seed stay safe from thief/robber, who pay focus on the things inside your safe, not the fucking back
* store them near your home safe keeps the seed stay safe from the coincident visible by someone
* store them near your home safe means you know exactly where you store it, and only you have the legal access to it.