Comparing Oxycodone/Acetaminophen 7.5-325 mg to Hydrocodone 10-325 mg, what is the difference for those of you who have tried both?

I am currently in Hydrocodone 10-325 for chronic pain in back, neck, and muscles due to having Fibromyalgia a d Chronic Pain Syndrome. I also suffer from sciatica. My doctor has now prescribed Oxycodone 7.5-325.

Thanks in advance.