Yeah, there's a difference, but it's just semantics and there's no point in pointing it out unless you want to be a giant douche bag. Which apparently all copyright infringers like to be to justify their actions.
For all intents and purposes, which would be the ethics of it, it is the exact same if not worse than theft.
Originally Posted by -Jes-
Also, piracy != theft, but = copyright infringement. Legal precedent says so.
Actually, if you want to argue semantics, according to wikipedia, "In some jurisdictions, theft is considered to be synonymous with larceny; in others, theft has replaced larceny." and larceny is, "a crime involving the wrongful acquisition of the personal property of another person."
Copyright infringement is also, "a crime involving the wrongful acquisition of the personal property of another person."
Therefore copyright infringement = theft. (Disclaimer: in some jurisdictions)