Do Volo's and the Monster manual overlap?

Or are they two sets of monsters? Or is Volo's a subset of MM?
1500110983
Sky
Pro
Two sets of monsters.
1500122811
MeditatingMunky
Pro
Marketplace Creator
There is zero overlap between MM and Volo, however MM has an overlap with the SRD. It's still worth the time saved to have everything in the MM.