There are a few numerical computing benchmarks for which Rust is sometimes faster than C: https://benchmarksgame-team.pages.debian.net/benchmarksgame/...
If true, can you say the difference is not due to chance?
(fwiw the GM that I see — whether the scores are based-on elapsed secs, cpu secs or "busy" secs — are a little slower for the Rust programs.)
Perhaps the median score of the Rust programs is faster?