I'm here to request some help.

I'm currently using a AX72 pro as my router and 2 RE450V3 to extend the Wi-Fi range. As RE450 V3 does not support Mesh (only V4) and I want to increase the range as well as the download speeds (2Gb on main router), what should I replace the RE450 with, a Deco M4 or a RE705X (Deco vs Extender).

I don't really know the differences as both claim they can create a Mesh AI, I only want to extend both 2.4 and 5 Ghz signals like I'm doing with the RE450.

Another question, as AX72 pro uses Wi-Fi 6, should I go for the RE750X mentioned before (capable of Wi-Fi 6) or does it not matter since the router itself has this technology?

Thank you in advance!