What do you need where?
They got almost similar power, so where do you need better radio and where more LAN-ports. If LAN ports not really needed I would use 5300 as parent router with more radio (one exlusively for mesh).
But again depends where you need higher WiFi throughput, we cant know your situation.
If you have 2 cars very similar, same engine and size but one with 7 seats and other with larger trunk, where will you use them, one need for your wife at home and one you take to work.
Do you have more than 2 children or is she buying large things, and what do you need at work, take your colleagues with you or full with tools.
Seems for you both will fit equal!