Eggs by 1 hen or 2?

[VVolfpack]

I have a Black Sex Link and a SL Wyandotte, I thought only the BSL was laying so far (They're 19 weeks old), but when I brought todays in and put it next to the others i noticed it's color is a little different. We've been getting 1 egg a day since our first came on Monday. Do you think these are from two different hens or can colors vary a bit from the same girl? Thanks

 

[Armageddon]

I say 2 different hens....

 

[Happy Chooks]

I think you have 2 girls laying. And I think the middle one is from the wyandotte.