In the short term, I think the intersection approach would be best.
Long term, I think using PartialEq would match what I expect most. While I’m perhaps not very familiar with pattern matching due to mostly being familiar with C++, I expect pattern matching to be user extensible and respect the existing ways that users can change the behavior of a type. If I define PartialEq for a type, I expect the semantics of the entire language to respect it, not just parts of the language. That’s probably the biggest consideration for me, since I don’t like special cases (if I wanted lots of special cases to remember, I’d use C++ rather than Rust 
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