what's the difference between the two nand gates?

[youqi]

in the following picture, all the PMOS have the same parameters and all the NMOS have the same parameters.
what's the different between them?

 

[jeffrey samuel]

in the following picture, all the PMOS have the same parameters and all the NMOS have the same parameters.
what's the different between them?

View attachment 77961

the answer is in your post itself the gate in the second diagram varies the op

without knowing what ip you are going to provide it is hard to tell its true functions

 

[godfreyl]

what's the different between them?

I think they're functionally identical.
If you delete the two NMOS on the right, it should still work as a NAND gate, but the properties would change a bit.