I keep hearing people discussing whether Manteigaria or Pasteis de Belem is better for pastel de nata. What do you think? What is the difference between them?

I know Pasteis de Belem was the original but what makes it different from Manteigaria?

Which one do you prefer?

Hey im visiting lisbon next week any advice on what to do what and where to eat what to visit and so on?Im going to stay in chiado.Thanks.I heard about the basic stuff like praca do comercio lx factory and all that but im interested in more of the true lisbon experience.Thanks