i am a childminder too, so biased again BUT a childminder is a constant person for your little one to bond with, and can also offer a varied day - for example i might go to park, visit friends, go to library, go swimming, stay at home and play, go on the bus into town and meet some other cm's for lunch etc. etc.
at nursery, different activities may be offered but that is usually where the child stays all day, and also lots of different people may care for a child during their time there, so it's less 'personal'.
quite a few friends have told me they chose nursery because they were worried about what to do if a childminder was ill or on holiday - but lots of childminders i know provide cover for one another in these situations.
have you looked at any childcare yet? maybe you could go and see some nurseries and some childminders and see if you get and instinctive feel of what is right for your child(ren) - after all, you know them best
hope this helps, sorry its long winded