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It is more versatile and has some improvements but the iPhone 8 camera was very good (well I thought so). the iPhone 8's lens is 28mm but the 11 Pro I have has 3 cameras. 13mm, 26mm and 52mm so there's more optical zoom and less digital which improves image quality. It's also slightly better in low light.

I really like using the 13mm lens when out and about as it's perfectly suited to landscapes.