Currently, Apple's catalogue features the popular iPhone 11 which provides excellent value and the iPhone 13 Pro Max which is a behemoth of power. Here's some information to help you decide between the two. 

Measuring 75.1 x 150.9 x 8.3 mm and weighing just 194 grams, the iPhone 11 is the smallest of the two. It has a 6.1-inch screen compared to the 6.7-inch iPhone 13 Pro Max. This difference benefits the newer iPhone 13 Pro Max when it comes to viewing video content or playing games.

In addition, its screen is accompanied by a more efficient A15 Bionic chip than the A13 chip in the iPhone 11. The iPhone 13 Pro Max (78.1 x 160.8 x 7.4 mm and 228 grams) is heavier and more imposing than the iPhone 11, usually requiring both hands to navigate the screen.

The iPhone 13 Pro Max is two years newer and benefits from technological improvement in terms of components and performance. It has a more efficient chip and more RAM (6GB compared to 4GB). The iPhone 13 Pro Max also has a larger starting storage capacity: 128GB versus just 64GB on the iPhone 11. It will also be compatible with Apple's software updates for two more years.

In terms of battery life, it's also a clear winner. It's reported to average up to 10 hours longer per charge, at a whopping 25 hours of video playback.

Do you use your smartphone to watch movies or play games regularly? The 6.7-inch screen of the iPhone 13 Pro Max is perfectly suited for this. If you're looking for a versatile device with an excellent price/performance ratio, then the iPhone 11 is the right choice for you. It's several hundred euros cheaper and offers most of the same experience.