Finally go my hands on the trade. And yes, there are changes, outside the mentioned by resipsaloquitur: Some corrections on coloring, mentions to the Gentry. Minor aspects, really.

But also it possible to see the covers of alternate comic books than could had been published in another universe: Major Max from Major comics, Doctor Manhattan (Captain Atom? Or other Dr. Manhattan?) from Keyhole (Gold key as guesed by...Who?), Cyclotron in Spire comics (rightly Tower ), Stingray (one of the alterante Batman) in Victory Comics (which is Atlas comics. But I guess it not refers to the editorial-previously-known -as-Atlas, but to an editorial which made DC reprints in the 70's) and Stellar Comics (aka Andy comics), which baffles me.

Someone got a clue?