06H121026AB - Is an original water pump for the CCTA and CBFA engine. That I have seen from my car and others that have had their's replaced already.
06J121026AN - Water pump that you are inquiring about.
06H121026BA - Newest one that I know of, and the one that was put into mine about 1k miles ago as pertaining to the CCTA and CBFA motors.
I don't see why you CAW motor couldn't utilize the "newest" pump revision.