Help with sexing please

[jaywin]

Hi
These are both wheaten Marans same age - 4weeks. Does the one with black feathers look like a boy? He is bigger and has more of a comb but it’s the colour that makes me think he’s a boy?

 

[jaywin]

Also need help with the possible breed of this please. Told it was a black leghorn - probably, but it has white stripes in feathering and also a white bum and chest. Can’t seem to find any pics of these at this age to get an idea so I’m sure there is someone on here who has experience of them. Many thanks.

 

[jaywin]