Samsung is gearing to release the Exynos 2100, which is expected to debut in the Galaxy S21 series early next year. Now, early battery life results of Samsung's latest chipset have leaked, and they paint it in a good light. Apparently, process and structural changes have yielded a 15% improvement alone. But, the difference between the Galaxy S20 Ultra and Galaxy S21 Ultra in some battery life tests could be huge, according to one leaker.
https://www.notebookcheck.net/The-Samsung-Exynos-2100-reported-to-offer-monumental-battery-life-improvements-over-the-Exynos-990.509017.0.html
The displays are difference this result tells nothing about chips battery drain. Better compare 2100VS888.