Daycare or stay at home with grandma

I need some outlook what’s better for my 16 month old. We just got a spot open up for daycare which we have been waiting for a while but at the same time my mil is now retiring to help watch her as I go back to work. I want my daughter to go to daycare as I think it will help her grow and be around other kids but my husband thinks she’s too young and should just stay with his mom since she’s retiring to pretty much watch her. I’m torn between both situations, I know we’ll save money and she won’t get sick but I also want her to thrive and not get certain behaviours that his mom might teach her. Anyone have any experience with either and how has that been for their little one? Thanks!