Samsung have a long history of releasing the same phone with a different SoC in different regions - Snapdragon in the highest-value markets, but slower and less efficient Exynos everywhere else.
One marketing name (Galaxy S9) has multiple different model numbers - I installed a custom ROM on many Qualcomm as well as Exynos Samsung phones, is not as bad as you make it sound.
Personally I consider the Exynos phones to be better - more customizable, less weird code running in hypervisor mode. Performance is good.
Personally I consider the Exynos phones to be better - more customizable, less weird code running in hypervisor mode. Performance is good.