Do I need to change to Go5G to maximize upgrade subsidy (on Magenta Max now)?

I'm on Magenta Max today with 4 lines, looking to upgrade all four devices at once (3x iPhone 13 and a GS20) to newer versions of the same iPhone/Galaxy.

Is the way to maximize subsidy here switch to Go5G (Next or Plus)? Is there a difference in subsidy between them? Any particular strategy I should follow to minimize future rate plan + device overall cost? Appreciate any advice you can offer!