Hi LindaB and welcome,
Ohhh, Josefina is so pretty. Dd12 has a PM Josie and dd9 has an early Kit, may be Mattel. Kit has the same face mold as the Nellie you saw (a friend of girls has Nellie and comparing the two Nellie is slimmer body, the face is skinnier also if you really really look, and of course different skin tone and hair color), isn't she a pretty doll!
The furniture depends on the pieces, Felicity has just been reinroduced into the catalogue, has always been around almost retired then a huge campaign with movie and some of her things revamped, I think that is where alot of comparing is that you are reading. The quality is there but not like some of us remember and still wish it could be.
Early dolls were made in Germany and are tagged as such in clothing and on dolls. And cloth area was white early, early (WB,white body), I'm not sure when or tags on those, they were the very first, then some were signed. The ladies here can help with that.
Check out curtdanhauser.com/AG_Collecting, you will see the complete (I think) AG collections, this includes the retired items. But beware, you'll just see things you want, wish you had and feel you must have.
Again welcome to the board, you all keep convincing me it is OK for ME to get my own doll, now I wouldn't have to share it with my girls Right?
Enjoy the board, alot of great advice here.

Mary D