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By scrolling side by side on The New York Times homepage, with both the iPhone 13 Pro Max (and the iPhone 12 Pro Max) side by side, it was much easier to see the text on Apple’s newer device than I could on the iPhone 12 Pro Max. It feels responsive.
iPhone 13 Pro Max review
Notable is the inclusion the Apple A15 Bionic processor - Apple claims it is half the speed of other mobile processors. Both the Pro Max & Pro Max now have an upgraded 5-core CPU. This is in addition to a 120Hz touchscreen, upgraded battery, camera sensor improvements, and a more powerful processor.