For years now, Samsung has had two suppliers for chipsets in its flagship Galaxy smartphones. In the U.S. and select other countries, you get a Qualcomm Snapdragon SoC. In most of the world, you get one of the firm's in-house Exynos processors.
With this year's Galaxy S20 series, the two chipsets are the Snapdragon 865 and the Exynos 990, and users aren't happy. Well, at least around 20,000 people aren't happy, according to a new Change.org petition.
The petition demands that Samsung stop using Exynos processors, which it labels as "inferior", in its flagship smartphones. Put simple, the petition claims that, "Phones with Exynos SoC chips [sic] are shown to perform slower, have less battery life, use inferior camera sensors and processing, overheat and throttle faster, amongst other issues."
It hasn't always been the case that Snapdragon processors are better than Samsung's chips in every way. Back in the Galaxy S6/Note5 era, those devices only came with Exynos SoCs due to issues with the Snapdragon 810. On the Galaxy Note8, there were rumors that it would get support for 4K 60fps video capture like the latest iPhone had, since the Exynos chipset supported it, but the feature had to be held back for the whole lineup since the Snapdragon 835 didn't.
In any case of two different processors, one is always going to be better than the other. The only way to get identical performance and an identical feature set is to actually use the same processor in all devices. That does seem to be what 19,567 (at the time of writing) people are asking for.