Nanny is better because its one to one care.
If you by any chance lives in north and is looking for nanny , you can visit my thread :)
http://singaporemotherhood.com/forum/threads/highly-experienced-nanny-in-yishun-khatib.218307/
haha! you pay for what you get. there are nannies who place the kids aside to do their things as well as buy cheap ingredients for meals that are low nutritious and there are nannies who play music or provide quality meals like wild salmon (good for brain&child psychological) and cares deeply...