Is there any evidence to show that placental stem cells are more beneficial than autologous stem cells? specifically for fixing orthopedic problems

Placental stem cells: I did some search, how where I was unable to find any paper in which there is a discussion comparing the benefit of placental stem cells vs. than autologous stem cells. In most cases stem cells are procured from the umbilical cord, in many institutions in which bone marrow transplantation is performed, the institution keeps HLA mapping as well as haplotypes. Is quite possible, that in the future