For a smaller premium Android phone, this is a very sensible comparison. I would lean toward the Pixel 11 Pro if your priority is a simpler Google-first software experience and point-and-shoot photography. I would lean toward the Galaxy S26 if you prefer Samsung’s feature set, accessory ecosystem and wider customization.
Because compact flagships have less room for battery than their larger siblings, real endurance should be a deciding factor. Compare navigation, mobile-data and camera-heavy days rather than only Wi-Fi battery tests.
Also check physical width and weight in person if possible. “Compact” is personal, and whichever phone feels better in one hand may be the better long-term choice even if the other wins a few specification categories.