My mother who works for Schlumberger a company that deals with patents all the time as a legal patent secretary and she is highly disagreeing with you but what does she know since it's you know, it's only her daily job to know?The degree of similarity is irrelevant though - failure to defend your trademarks constitutes abandonment under copyright law, regardless of whether it is a significant infringement or merely superficial. Your issue is with US Copyright law (specifically the Lanham Act), because that is the reason Apple is filing these complaints.