Is it true that first time babies can engage sooner than second or subsequent?

For me, my 1st pregnancies was +1 week late because she was still in breech position still at 40 weeks. Gynae gave a go ahead to wait a few more days since myself and baby was okay. My #2 was engaged at 38th week, but somersaulted to breech at 39th before going back engaged at 2 days shy of 40th weeks. I guess it differs from each pregnancies.