It's been a few years now since my Rottie passed away (proper miss him)

so I'm thinking of getting another dog now but I want an English Mastiff or aDogue de Bordeauxbut I don't really know much about these dogs so I'm hoping you people will tell me the main differences between them & also the temperament etc of the two dogs.
Oh if you have either dog & have any pics of them as a puppy & fully grown I'd love to see them
Thankyou please