Last news re. Western armor that appeared on Tank-Net seem to show that at least part of Abrams side turret armor is arranged by a similar principle to BDD/T-72B/T-90, i e multiple thin layers, of unknown composition, prolly metal with something in between. (EDIT: Based on a pic from iraq showing M1 with rear turret side outer layer blown off by IED)
There were suggestions that the entire Chobham, rep. the US version, is arranged in a similar fashion, ie no bulk ceramic with inserts, but lots of thin stuff, IOW that both sides reached similar arrangements for similar reasons. though of course that remains speculation until someone manages to dissect M1A2SEP in detail
Or, for that matter, T-90A or Leo 2 or Chally 2. Anyway similar structures were also seen on damaged NERA modules from Merk IV from Lebanon.
EDIT: Re. ERA, the representation as it is in the game is "good enough", any attempt at more details will drown in a swamp of details... Just decided to look into remnants of ERA and their effect on armor, seems that Kontakt-5 and other newer ERA will have some influence, as their outer plate remains in place and the action is contained inside - IOW even after the ERA is fired, the 15mm standoff armor at some angle remains there and works a bit.