Well, my Sussex lays an egg a bit lighter than the one in the photo. But I believe both the other breeds do also. I can see the colour difference between the eggs of my Sussex and my Columbian Blacktail whose eggs are a bit darker than the Sussex, but its not very obvious unless I have both of them together to compare. It's a lot easier with my blue egg C.Legbar and my white egg Leghorn!
Maybe you' just have to go on nestbox patrol for a bit, especially when you are getting eggs from each of them and can notice smaller differences. If this is their first lay, once they've got to the stage of laying bigger eggs, the comparative sizes are a good clue as well. My quite tiny little Blacktail lays a bigger egg than the Sussex, who is a much larger bird.