AWACS E-3 question

are there differences in capability between the following ? does the US delete
some goldstd-modes when exporting to the rest ?

(a) USAF E-3
(b) NATO E-3
(c) French E-3 (if any)
(d) Japan E-3
(e) Saudi E-3

I am talking of the radar and mission avionics.

Also, in the OTAN pool, does each country’s AF get a set of dedicated E-3 to play with or the planes rotate to each user as needed ? I mean in first case, there is chance of UK getting some “special” gear but not the FrAF :diablo: