Chicken egg difference... question

[nao57]

So I raised 2 chicken chics to full size. They are now big, like 7 months old. They are supposed to both be black sex linked chickens.

However...

One of them has little red splash coloring on the front of its black feathered chest, with most of the chicken black. And I noticed that the other one doesn't have this red spackling on it. I also noticed that one of them has black toenail tips but the others tips are lighter colored.

And when they started laying even their eggs are different. Here is a pic of the eggs. Although in person the difference looks bigger. One egg is a very light brown, but one of them is much more dark. The texture even felt different.

I wonder...does this mean the black one without red spackling might not really be a black sex linked chicken?

 

[GC-Raptor]

does this mean the black one without red spackling might not really be a black sex linked chicken?

No, but pictures would help.
Sex-links are a hybrid and variations are normal.
I've had red sex-links Golden Comets and ISA Browns and no two are exactly the same, some are way different.

My Golden Comets at 16 weeks old. Notice the different shades.

3 of 5 ISA Browns also have different shades. I can tell them apart.

Eggs from my Golden Comets. GC

 

[PopoMyers]

No, but pictures would help.
Sex-links are a hybrid and variations are normal.
I've had red sex-links Golden Comets and ISA Browns and no two are exactly the same, some are way different.View attachment 2282094
My Golden Comets at 16 weeks old. Notice the different shades.View attachment 2282091
3 of 5 ISA Browns also have different shades. I can tell them apart. View attachment 2282104
Eggs from my Golden Comets. GC

I also have both breeds, and mine have similar differences in looks and eggs as well. The rear of the golden comets seem wider than the ISAs. Almost couldn't distinguish them for awhile.