I have used both for my 3 DC's,who range from 12 yrs to 20 mths.
My DD1 went to a Nursery at age 5 mths,I found it a real wrench to leave her with "strangers" who incidently were very young,some looked 17-18yrs old.
At this age she was sat in a bouncy chair or on someones lap.She wouldn't have her naps there,even though she had a good routine,the cots were in the same room,so the noise level was probably too unsettling.
I hasten to add it was an excellent Nursery by all accounts,but to me was too inpersonal.
I then tried her with a Childminder,who was fabulous,she had her naps upstairs,in a quiet dark room. The childminder took her out to the Library for Baby/Toddler story times,took her to the park,and on "walking" school runs.They often made lots of things together,craft things,pictures and biscuits etc.
My DD1 stayed with her until she was2.5 yrs old,when we moved.She and I were very sad to say goodbye as she'd been like a 2nd Mum to her.
What more would you want for your DC IMO ?
I have since found 2 more Childminders,who have also been excellent.
IME they have been very reliable,and very flexible.
The Cost is an implication as well,especially with 2 DC's IME, even with a Nursery Sibling Discount of 5-10%,this option was too expensive for me,but with Childminders its usually half the cost. HTH