Difference in rolex papers

[Tombrone]

Hello,

I have seen a lot of sellers with a lot of watches and a lot of different sets of papers.

I know the difference in boxes, but what are the different kind of papers?

For example, a rolex GMT 16710 Y serial can come with these two different types of papers:
1) in the top right corner it reads; Y...., and below this it reads 'number' and then 'style', and then steel, steel and white gold...
2) in the top right corner you can only read the serial number, and directly underneath it reads: steel, steel and white gold, ...

Anyone has an explanation for this?

Thanks,
Tom