You know something. Here’s my take I think it’s all to do with how the panels are bonded together and not necessarily the manufacturer models or serials. I also think that these OLED panels get less “yellow” as they age. Wasn’t there something about this on the inter webs about the glue curing or some BS like that ? Ain’t it just strange the most of the time when an iPhone is release most people inc ourselves talk about yellow tint. But then a year or two later the comparison between the outgoing model and the newer one is “ wow my previous iPhone was brighter and less yellow..” I’ll digress. 😂🤣Figured as much haha