I chuckled.
I think a big difference between Zeta and ZZ is in attitudes to how kids are treated in the story. In MSG and Zeta, Amuro and Kamille are slapped and kicked around until they man up (though where Kamille is concerned, it may actually have been ever-so-slightly satisfying at times) which ultimately brings them little other than to emotionally wreck them.
In ZZ, the boot's kinda on the other foot, literally. I don't know how intentional it all was, but I have to suspect quite, given the fact
ZZ featured a scene of Judeu beating the sh*t out of Wong Lee (who'd previously beaten the sh*t out of Kamille in Zeta) and having the show pretty much end with
him punching Captain Bright.
As such, I feel less like the two shows are jarringly different to one another (something it seems a lot of people do feel) and more a logical progression of the same belief - If war is crap for the younger generation and causes them to suffer through no real fault of their own (Zeta) then actually, they should stand up to the older generation and stop it or at least refuse to take part in it (ZZ).
Or to put it another way, if Zeta Gundam is
Where Have All the Flowers Gone then ZZ is
Children of the Grave.
Still the worst transliteration ever.