Basically every Galaxy phone comes in two versions. One with Exynos and one with Snapdragon. It's regional though. US always gets the Snapdragon phones while Europe and mostly Asia gets the Exynos version.

My understanding is that the Exynos is inferior in a lot of ways, but also cheaper.

Not one phone, they did this all over the place. Their flagship line did this starting with the Galaxy S7 all the way up to Galaxy S24. Only the most recent Galaxy S25 is Qualcomm Snapdragon only, supposedly because their own Exynos couldn't hit volume production fast enough.

This is the case as recent as of S24, phones can come with exynos or snapdragon, with exynos usually featuring worse performance and battery life

I might be out of date, but last I knew, it was "most of them."

International models tended to use Samsung's Exynos processors, while the ones for the North American market used Snapdragons or whatever.

Several high end Galaxy S's AFAIK.