Those appear to me, to be the exact same gecko, i have no question about that. Its quite obvious looking at the V markings on the back. One pointing up to the head, and one pointing to the side, in both pictures that arrow points TO the person viewing the picture.
The second is hard to tell, because the fired up response seems to darken inside the Cream coloration along the backside, and fill it in more. Whether others agree with me or not, is a different story, but the marking on the Knee, and the number of crests in each splotch of color and the positions they are along the back, is enough evidence for me that it may very well be the same gecko, and just in bad lighting ( which DOES affect the color slightly) and in a different mood to not promote the RED color youd like to see in eds pics. Also, the number of crests, in the patterns appears to be the same, at least to me. So that is another thing that leads me to believe its the same gecko.
I think they are both the same geckos though, and i also think that i have reason to ask what you have been feeding them, since you say that one of them dosnt have calcium sacs. *though you got a horrible photo... i must admit.*
If those photos of yours were taken a month later, then yeah, i believe that stands reason depending on what you are feeding those geckos. Since you dont have photos of them when you got them, i dont think that is a legit claim.