Question about PCI-e lanes

[Fuglfisken]

Hey! New user here. I recently moved to another country and was forced to ship my computer by mail. Long story short, my cpu socket got damaged but i found a new (used) msi x570 tomahawk that i installed today. 

 

I had some trouble getting it running most of which was caused by my PCI-e network card which turned out to contain the same controller as the one onboard the MoBo (intel AX200). 

 

Turns out windows doesn't like two of the same devices. I thought i would disable the onboard one, assuming the PCI-e one would be better somehow. It did the trick.

 

However now i am thinking if this is actually the case. I am running two m.2 drives one of which is a PCI gen4 as well as the 2080ti.  Thats a lot of traffic through the PCIe system. 

 

Now i was just curious which one you think would be better to use, if any? 

 

My technical knowledge here is limited and and i'm sure whatever differences would be minimal, however the thought made me curious and i might even learn something in the process.

[Electronics Wizardy]

Id just use the onboard wifi card, no reason to use the pcie card when the onboard one is the same model.