@DukeCaboom 

Hi, maybe you could try to compare the network specifications of these two models and leave the one with a higher wireless standard and necessary advanced features.

Normally as long as the whole pack of Deco or Eero could cover the whole house separately, there is no need to merge them together. (usually, they are unable to be wirelessly integrated with each other and you might need to run an Ethernet cable between them) Too much wireless signal sometimes would be overkill.

Thank you very much.

best regards.