truth and myth behind delco oil filter?

[irondiezl3]

I have seen so many posts online about delco filters. It drives me nuts. I always figured delco has to be good for our cars oem. But then I see posts saying delco oil filter is just a cheap stp oil filter with a delco sticker. Then I buy one from walmart and one from local auto part store same part number pf52 but the insides look different? I dont get it shouldn't they all look the same? anyone know anything about delco filters who makes them? are there different variations? or why i have 2 different looking pf52? I'd love to know whats truth and whats myth here? searching online has only shown me opinions.