alt Hacker NewsThat does not seem like even close to a fair comparison and makes me wonder how valid the conclusion is. Effectively this is two times n=1, if you use 'teams' when you actually mean 'individuals' then that's not really proper reporting.
I do applaud you for having the same work done twice but it would have been far more meaningful to have two actual teams of seasoned developers do this sort of thing side-by-side. The biggest item on the checklist would be the number of undiscovered UB or UB related bugs in the C codebase and to compare that with the Rust codebase on 'defect escape rate' or some other meaningful metric.
I think there’s another hidden issue of testing how new devs use the language vs. those seasoned devs. I expect someone with a few months of experience would prefer Rust (fewer footguns) but someone with more experience would prefer C (the sharper knife). The flavour of the thing changes as we age.