Hard to tell for sure on such a small picture but even though it is quite bright it still looks to me like it has a slight grey cast to it. I think in a jumbo picture like the other one it would show much more clearly especially around the fold lines.
I just hope the other one is a white title or I am going to feel really really bad. I am 95% sure based on the large image, I see no indication of grey.
As a result of this I have been expanding my research on the ESB Advance one sheet and although to early to say for sure it appears that including the white title there may be as many as 4 different distinct print runs for the advance, all slightly different for NSS alone. Once I nail it down better I will post something.