US Supreme Court rules for Google over Oracle

Read the court arguments laid out in the PDF (just pages 1 - 4):
Their wording is quite easy to comprehend (i.e., non-legalese) and concise.

IANAL, but this reads basically as a broad "reimplementation of APIs is generally allowed, primarily for interoperability, because that is a fundamental principle how software operates (today)", very similar to the EU's stance on that.