Its an interesting set of cases.
Wikipedia has the details, and what struck me is this one:
en.wikipedia.org
Legal review of the cases identify the key issue is whether Apple's control of the iOS App Store is a monopoly or not. Epic Games has argued that Apple maintains a monopoly for iOS-enabled devices, and thus its behavior in restricting alternative payment systems and storefronts are anticompetitive. Apple contends that the marketplace that Epic participates in is multiple platforms, not just the iOS, and in that perspective, Apple does not have a monopoly.[13][14]
Now, let's consider that, in light of what happened in the Google case. If the judge had let Google win... what would be the effect? Effectively, Sweeney would still be
bound to a 30% revenue cut and would even have to allow that to extend to in app purchases (one of the focus points in these cases is the ability to offer your own payment service
within apps). Effectively, then, Apple and Google would be able to determine between themselves that 30% is the new norm. That's not a healthy market right there. That's a cartel.
There are no longer any ways out of this if you ask me. If the rules count for Google, they also do count for Apple, and when taken together, its the only possible outcome or you can't possibly defend that we have a system that tries to preserve healthy market conditions.
It just takes a bit long to figure that out, but this will happen, because now Google is facing unfair competitive position versus Apple