It includes much of a Quora answer that I wrote on this topic. Please see How does the California Consumer Privacy Act of 2018 compare to GDPR?
Disclaimer: This comparison, of necessity, is limited to the broadest generalizations. While the California Consumer Privacy Act or 2018 (“CCPA”) is of a respectable length, the EU’s General Data Protection Regulation (“GDPR”) has 99 Articles, most with several Sub-articles – and that’s preceded by 173 lengthy paragraphs of recitals! Consequently, most of what follows is, in reality, subject to significant additional details, qualifications and exceptions that are too numerous to include here.
Now available for download: A four-page GDPR-CCPA comparison table that includes many more details than are in this post.