I heard on a podcast that some part of the difference in the two rulings was due to the fact that Google was cutting deals with some companies/developers to lur

I heard on a podcast that some part of the difference in the two rulings was due to the fact that Google was cutting deals with some companies/developers to lure them to their store, meaning not everyone was equally subject to the 30% fee. Apple (to my knowledge) hasn't done any deals like this - everyone pays the same fee, no special treatment (until recently, when they reduced the fee for apps with revenue <$1m)