i think NTUC is mainly childcare.Learning vision too.
The fees for NTUC is cheaper especially after subsidy.
Depending on which center you are intending to send your kid to, there will different standards and different teachers so can't really help much.
I would advice you to go down to the center and compare environment/teachers whatever your criteria and see which is to your liking and that would provide a condusive and safe environment for baby.
Overall, i would think that Learning vision is better.