detect if comparison chain that could be a tuple comparison instead

The if_same_then_else lint triggered on the following code I use to sort some stuff:

positions.sort_by(|&(x1, y1, z1), &(x2, y2, z2)| {
    use std::cmp::Ordering::*;
    if z1 < z2 {
        Less
    } else if z1 > z2 {
        Greater
    } else if x1 > x2 {
        Less
    } else if x1 < x2 {
        Greater
    } else if y1 < y2 {
        Less
    } else {
        Greater
    }
});

I'm not sure if Clippy could reason about this or if it's even worth the trouble thinking about that but perhaps this is worthy of a footnote in the wiki?

Start by reading the existing if_same_then_else lint and searching its coverage for the reported comparison-chain pattern. Determine whether the shown ordering logic should be recognized as tuple comparison, then define tests that establish which chains trigger; done means the intended cases are detected without unrelated warnings.