Answer:
Same withdraw symptoms such as hot/cold sweats, nausea, vomiting, diarrhea, and muscle aches and spasms. The difference is the methadone withdraws are 10 times worse and last weeks to months longer depending on how much is built up in your system. Be careful with either withdraw though cause they are serious and sudden stopping could be fatal.
Any Opiate withdraw can be fatal when you've been taking large amounts for a long time, I've seen reports of people dieing from Codeine. So if you've been taking large amounts for a while of any Opiate, do not go cold turkey, always seek help from a doctor or do a taper (take less ever 3 days, until you are taking almost nothing at all, as in a 1/12 of a pill or less.