3 reasons you should buy the iPhone XS Max instead of the standard iPhone XS

Last year's iPhone X could last about 12 to 13 hours on a single charge.

This year's iPhone XS lasts 30 minutes longer than the iPhone X, so expect 12.5 to 13.5 hours.

But iPhone XS Max has the best battery life of them all: It lasts 90 minutes longer than the iPhone X, so expect 13.5 to 14.5 hours.

Both new iPhones feature identical processors — including Apple's new A12 Bionic chip, 6-core CPU, a 4-core GPU, and a next-generation neural engine that's dedicated to machine learning.

But for some reason, the iPhone XS Max performs slightly better than the iPhone XS when it comes to benchmark scores for graphics and overall speed.

Tom’s Guide performed three separate benchmark tests on the iPhone XS and iPhone XS Max — Geekbench 4, which measures overall speed, and 3DMark Slingshot Extreme and GFX Bench 5, which both measure graphics performance. The iPhone XS Max came out on top in all three tests. (Both phones performed much better in those benchmark tests than last year’s iPhone X.)