I don’t have the answer to your question but I was just about to post a similar problem so will watching this with interest. For me the Fibaro dimmer 2 doesn’t dim as low as the Varilight v-Pro it replaced.
I’ve installed Codesaur’s device handler which gives access to the various parameters but I can’t find one that allows you to manually set the minimum light level (which you could do with the 211 dimmer 1).
Fingers crossed someone has the answer.