Gold Supporting Member
I know I did not post every possible brand but these seem to be the most popular.
No doubt, the RME drivers are the best. For the most part people will be satisfied with under 10ms RTL. People tend to care about it more when they're aware of the numbers.If you want to use amp sims etc. without delay or latency, RME is the best by far. Non of the others are close for round trip latency. The RTL numbers they publish are false.
This thread on Gearslutz has been accurately testing them on the same system for a number of years. The RME rtl is very low.