Extracting Groove from a audio beat

Hi Guys
I want to copy the groove from a beat to a midi part, which is the correct way?
Is it by clicking on the audio and then click create groove quantize, or do you just simply drag the audio loop etc onto the quantize panel?
The issue I have is that it never appears to be the same, when I drag int onto the panel, there are lots of settings on the quantize panel, what do the settings need to be to copy the groove exactly from the audio?
cheers