With the Pro Max's logic board extracted, we're tempted to say it might be even more compact than the one in the iPhone 12 mini (bottom)—but, the mini's integrated SIM reader also leaves it at an unfair disadvantage.

The 12 Pro Max benefits from a detached, modular SIM reader like in the 12 and 12 Pro—which also happens to be a bit more repair-friendly.

Here's a quick X-ray view of the board before we slice it open. We'll have to take it one layer at a time, but it's neat to see them all at once. It's an amazingly intricate city of silicon driving these iPhones.