Benefits and concerns of having several ords.war per PDB?

I have been reading documents and several blogs mainly because interested to have the prehook-function to work.

Didn't quite find what problems might raise if there are several ORDS configurations for same PDB clone.

     I assume that it is wise to have the ORDS setups as well clones, so problem about having different versions of ORDS requiring validate.

Also are there other benefits several ords.war per PDB than having fundamentally different configurations?

And will there be performance benefits of having several ords per PDB?

rgrds Paavo