It's not really that specific. There's a actually a hidden command there for comparing the current source file against an older version (otherwise, good luck testing the diff GUI without pre-recorded test cases). If anyone's interested, it can be very easily converted into a proper feature.
That said, when you review human work, the granularity is usually different. I've actually been heavily using AI to do minor refactoring like "replace these 2 variables with a struct and update all call sites" and the reviewing flow is just different. AI makes fairly predictable mistakes, and once you get the hang of it, you can spot them before you even fully read the code. Like groups of 3 edits for all call sites, and one call site with 4. Or things like removed comments or renamed variables you didn't ask to rename. Properly collapsing irrelevant parts makes much bigger difference than with human-made edits.
That said, when you review human work, the granularity is usually different. I've actually been heavily using AI to do minor refactoring like "replace these 2 variables with a struct and update all call sites" and the reviewing flow is just different. AI makes fairly predictable mistakes, and once you get the hang of it, you can spot them before you even fully read the code. Like groups of 3 edits for all call sites, and one call site with 4. Or things like removed comments or renamed variables you didn't ask to rename. Properly collapsing irrelevant parts makes much bigger difference than with human-made edits.