If it was the same cover, you'd have to wonder about the substantial price difference even more than you usually would. Why would you pay $60-100 more for a Saw, when you could have an almost identical ball reaction for so much less?
I ask this not in the hope of criticizing Lane 1 or pushing AMF, but I would think that it just wouldn't make for good business sense if mrbowlingnut's suggestion was true. Then again, people will pay for a name...
I doubt they are the exact same cover, though they have similar coloration. Dyes do not a cover make.
Furthermore, it should be noted that Lane 1, MoRich, and other companies whose balls feature non-in-house coverstocks, often make requests in regards to the formulations desired. Whether it be because of an additive or some other modification, the Lane 1 covers are most likely not the same as 900G's or AMF's.
On a side note, unless you have evidence or first-hand knowledge, I would think it best to not spread falsities, or even wonder in such a way as to create a false impression. And if you do have evidence, then proclaim it. Until then, all you are doing is stirring a pot that doesn't need stirring. It would be unfair to AMF, 900G, and Lane 1, to hint at something nigh-deceitful, without giving ample explanation for your thoughts (besides the color of the balls).