Train,
My personal experience is that Percocet 5/325 seemed to be more effective than Norco 10/325. That could be because the last time I had a Percocet was 4 years ago and I been on Norco about 2 weeks now.
I found this link below surfing around it is interesting.Narcotic Equivalence Converter http://www.medcalc.com/narcotics.html
Davis