When the Pro launches then PS5 is the weaker console. It will be the one holding games back for Pro owners at that point.
Like its been stated many times, there is no PS5 console that will be weaker than the PS5.
if you wanna keep comparing it to the Series consoles...
In terms of weakest to strongest just based on specs:
Series S/PS5/Series X.
For the separate platforms: (if there was a Series X Pro)
PS5/PS5 Pro.
Series S/Series X/Series X Pro.
Its not hard to see where the base PS5 slots in for this scenario...its literally going toe to toe with the XSX. The Series S is weaker than the PS5.
Going by your logic, a Series X will hold back the Series X Pro.
Those that wanna keep trying to compare the PS5 Pro to the Series S....if you can't understand why the PS4 Pro, One X and One S All Digital were all discontinued before the base consoles....I dont know what else to say.