Which is better for 9900k Maximus X formula or Maximus XI hero

[Ajinta]

Hello.

I wonder which of the two motherboards is better for running 9900k processor.

I am currently Running A maximus XI hero with full costum waterloop from ek and a monoblock from EK. That means that VRM and CPU are both watercooler.
I also have in my possetion a Maximus X formula which has a VRM watercooler build in and in that case I would use EK EVO supremacy block for CPU.

So basicly I have both Maximus X formula and Maximus XI hero boards at me. Both boards have vrms watercooled.

Which of the boards is a better choice to keep using for 9900k overclocked to 5Ghz. I know there is some differences in VRM of both boards and this is why I am asking couse boards are Z370 and Z390 but one was kinda higher placed than another. I wanna keep the better one and sold second one until they still hold some value to them.

[edrickjk]

Dont know if this would apply to all z370 and z390 ,but my previous board x code needed 1.34v for a stable 5 ghz all core 0 avx offset. My xi extreme need 1.29 v. If it the same case for you i would stick with the most recent board.