hi
a maid will help you with chores around the house whilst a confinement nanny will concentrate on the baby and you (stuff like doing some feeds/bathing the bub and also making sure you eat certain foods to 'expel' the hot or cool air (can't remember what is the custom).
both are great if you decide to go for both. although i know for some having too many women in the house during the initial first time parenting month can be quite overwhelming (especially if you have mother or mil in town).
i would suggest you talk to as many people as you can on their experiences with both confinement ladies & live in maids. then decide what it is you want help with at the beginning. worse comes to worse you can always let go of your confinement nanny if you find things are not working out (a friend of mine has done this, but make sure in the initial contract)
some maids are experienced enough to help you with babycare, just ensure you employ someone with this experience and references to back them up. and maybe this is all that you decide you need.
take your time with this and all the best with your decision & birth!