Difference between EM and CRPS Type II

I have seen multiple doctors and have had varying diagnosis. Curious if you can help me distinguish key differences between EM and CRPS type II?

im diagnosed with crps but i actually have erythromelalgia 100%, i like having crps on my record so that it looks better on my medical record when i try to get disability. there are a lot of differences, and they are case by case so looking up each one would be the only way to contrast them, but there are many.