Difference between dark and Silver Brahma Chicks

[Brahma Fanatic]

Good day all

I bought some dark brahma chicks probably 3-4 months old (not received yet)
The guy that I bought it from told me that this is dark and not silver partridge.
Please give some advice so I can stop the order if this is mixed.
The one on the right is the hen. is the coloring correct on them

Thanks

 

[Brahma Fanatic]

This is the other batch
Silver laced hen and rooster
the rooster is the picture on the left