Hello, My Name Is Cary. My Pain Management Doctor Just

Hello, my name is Cary. My pain management doctor just switched me from Norco 10/325 TID to Percocet 10/325 TID. I was instructed that it is stronger than the Norco regime I have been on (post spinal fusion w/nerve and pain complications 10 years after the surgery. I am very proactive in knowing what synthetic or natural medications go into my system and how I may react to it. Question: What is the exact difference between the two medications seeing how they are coded almost identically? Can you help?