are just trademarked names for the generics (hydrocodone and
oxycodone)...also, those opiates can be combined
with other analgesics instead of tylenol....example, "Percodan" is oxycodone with aspirin.
Sorry...hope I didn't confuse you...but while the drugs are very similar, and both strong opiates, there are a lot of differences, which people do not always realize.