Does a chicken's egg always look the same?

[Jurassic_Bawk]

I'm trying to figure out if one or two of my Welsummers laid these eggs. They are all fairly consistent in color and pattern except the speckly one on the bottom right. It is also smaller than the others. That's my second Welsummer's 1st egg right?

 

[Sussex19]

They can definitely change a bit, but normally not drastically.
If it is a bit smaller, (its hard to tell in the photo) then most likely it is the other ones first egg.

 

[aart]

Only time will tell.