Does Anyone know specific differences between the NES revisions?

On each Motherboard of an NES (NTSC) there is a code: CPU-NES-xx

These range from 04 to 11 (I think)

I would like to know if these are all of the revisions of the NES and what major differences there are between each one. (including chip sets, system architecture, etc) The most I can gather is that each revisions at least improves the CIC (10NES lockout security chip) but for even that I would love to know specifics. I have an 07.

I don't, but you can probably find all the info you need on the NesDev forums.

I'm fairly certain that you can swap the CPU/PPU set of any NES into another, that would lead me to believe the architecture stayed mostly the same.

Why do you want to know the differences? Trying to do some emulator work or hardware mod?