Shadowless cards in particular tend to have a range of varying saturation. The thin stamp here is clearly more saturated. I don’t think you can conclude anything from that other than it being tiny variances in the ink used.
The red line appears to be due to a slight holo offset. Similar to this effect but obviously not to the same degree:
rarepokemoncards.net/en/images/Pokemon-card-Kabutops-misaligned-holo-error-misprint-03-lr.jpg
Astro-holographicist: A person who specializes in the study of cosmos foil holographic cards
Some of the in-depth knowledge and research found in Pokemon cards should warrant a PhD degree. Who knows? If Pokemon is considered historically and culturally significant years from now, people might study it at universities where the evolution of Mitsuhiro Arita’s celebrated artwork will be interpreted in political, psychological and socioeconomic contexts.
We’ve already had confirmation that thick stamps were first. The difference between the stamps themselves is a difference in pressure used.
As for the ink treatment it was discussed a long time ago in another thread. There were two distinct shades that could be seen in the shadowless and 1st ed cards, however; the stamps didn’t seem to have any noticeable ratio to the color variance. Aka a lighter color card could have both thick or thin stamp with no one being more likely, when compared to a darker colored card and the stamp treatment it received.
