There are some serious issues with your post. First, an iPhone 11 has 6.1 inch screen and an iPhone X/Xs has an 5.8 inch screen. See the picture of apple's comparison website below. Logically, a screen protector that works on the iPhone X/XS would not work on the iPhone 11 or iPhone 12 (an iPhone 12 has a 6.1 inch screen).
In addition, the iPhone 12 Pro Max has a longer telephoto lens than the iPhone XS Max. At a 65-millimeter equivalent, the new telephoto lens on the 12 Pro Max has a 2.5x optical zoom. Compare that
Reasons to consider the Apple iPhone 12 Pro Max. 74% better performance in AnTuTu Benchmark (1153K versus 662K) Shows 39% longer battery life (35:23 vs 25:23 hours) Better camera quality (According to DxOMark rating) Delivers 30% higher peak brightness (856 against 657 nits) The rear camera has a 2.5x optical zoom.
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iphone 11 pro max screen size vs xs max