Good day

I'm new to this forum, so hello everybody.

I have one question which actually got me to register as a member here. It would help me out, and perhaps save the company some money if someone could answer this. So:

What is the difference between R403a, and R403b?

I know the main difference is the composition, but how about performance? How do you notice the difference in composition?

Thank you in advance for a quick reply.