Different shades of color on vintage cards

[Topnotchsy]

Hey everyone,

Thanks to the wealth of knowledge here and the friendly help I've found myself dipping my toe into a bit of vintage. I started looking at some of then early Exhibit sets and going after some singles.

I've also wanted to pick up some rookie cards of some HOF'ers which are within my budget.

I've been looking at Campanella rookie cards and noticed what appears to be a pretty significant disparity in the shade of the dark; some a lot deeper orange (and overall darker) and some lighter.

I pulled a couple of scans from eBay as examples and was wondering if this is to be expected from vintage cards, or if there is something to know about the different shadings (and if one is more desirable than another, or if one has a potential concern.)

Thanks in advance!