I was a childminder for many years.
My qualifications were : 1st Aid, child Protection, Behaviour Management, NVQ 1,2,3,4, EYPS.
Not all CM's are qualified to this degree, but ongoing qualifications are encouraged by Ofsted. Very few are under NVQ 3 level.
All CMs have to follow EYFS and do the same planning and production of EYFS as a nursery.
Most work evenings and weekends to fulfil planning and such, as well as updating childrens records, Tapestry out put for parents, qualifications, play qualifications, tax and invoicing.
Shopping for resources, shopping for food, nappies, hand-wash supplies.
I worked on average a 60 hour week, with 6 children. Three under 5 and three over 5, most staying with me till they aged out and went to High school.
All this for £4.00 per hour per child before expenses ( which can be heavy with little ones, things need replacing regularly. Think how much a double pushchair and quality car seats are) and tax. It is not a well paid job.
Now to the question. I've worked as a CM, ran a Nursery and been a Nanny.
All have there uses and time and place.
For me I woukdnt put a under 2 in a nursery, but feel they benefit from the other options. Over 3, definitely a nursery.