Old. The new Club Penguin has memberships, which makes it unfair for me, a nonmember, because I can do virtually nothing. But, the new one is pretty cool, I have to admit. The epf agency is cooler and there are cool new features.
old cp is the best because the items are very rare and if u have them then u must of been in the old cp and now that everybody says"BRING BACK OLD CP NOW"there bringing back old items