As for dimensions, compared to the iPhone 13 Pro Max, the iPhone 16 Pro Max is slightly taller (163mm vs. 160.8 mm) and thicker (8.3mm vs 7.7mm), but Apple's shaved down the weight significantly (to 227g from 240g).

The 13 Pro Max still feels fast, takes excellent photos, and easily lasts all day on a full charge even at 88% battery health. The usual improvements you expect from a new iPhone—faster processor, better cameras, longer battery life—would be lost on me in day-to-day use.

Processor: After a generation gap on the iPhone 15 and 14 models, the iPhone 16 and 16 Pro models each have an A18 chip. The main difference is an extra GPU core on the A18 Pro, but most users are very unlikely to notice.