Which router should be the primary and which should be the node?

[RouterMesh]

I have two routers. Router#1  is a ROG GT-AC5300. Router#2 is a TUF-AX4200.

One is a tri-band AC and the other is a dual band AX. 

Devices are 2 fire-stick 4k's, 1 Google TV, 3 cell phones, and a couple low bandwidth monitoring devices. My goal is to have lag free smooth streaming. I also have a 2TB USB  drive for backups. My question is which one should be used as the primary mesh router and which should be the node.  Any config suggestions appreciated 🙂

[jzchen]

My best guess is to try the TUF as the primary router first.  If you're happy with how they perform perfect, if not swap them and see how that works out:

https://www.asus.com/us/support/faq/1039646/