RA is symmetrical; botherhands, feet, etc. The pain from it is usually controlled when th inflammation is controlled from medication. Osteoarthritis can only be treated with antinflammotories. There is no m3dication to control the inflammation because it is not an autoimmune disease..
Example: I have chronic pain in my neck and back from Osteoarthritis. It's always present. It is worse at times, like when I'm working. I don't experience pain all the time with the RA when the inflammation is under control.
I hope this helps.