If you can get the WDM working, then that's the better route. Not just because it's newer, but because it is supposed to be faster. BTW - what I've just said is only a regurgitation...I have not performed any analysis myself.
Witness. MME are allegedly an older driver, sometimes referred to as "Legacy" drivers. I get fine results using the WDM. Actually I do better on my system with WDM than with ASIO.