Which is stronger oxycontin, or MS contin (morphine)?

OxyContin. Oc (extended release oxycodone) is stonger by a factor of almost twice-that is 15 mg of oc is about equal to 30 mg of MS contin (extended release morphine sulphate). But there is a lot of variability between individuals. Oc seems to be more energizing for some patients and as a result there is more "liking" which is independent of the pain relief. That may explain why there seems to be more abuse.
Potency? Oxycontin is more potent. One gets equal pain relief with about 50-66% of the number of mg of Oxycontin as it requires of morphine.