Rust is generally safer than Zig, but unsafe Rust is/was (mid)designed in such way that it's almost guaranteed to blow in your face eventually.

I don't know if mutable noalias has been already enabled for good, but even if there are no changes between compiler versions, those mutable noalias rules are super-tricky to get right.

In Zig, a pointer is just regular thing, you take care, but most pointers are arena-allocated anyway, and that's a bit like runtime-branded lifetime (which is great and Rust cannot do that, at least not in idiomatic Rust).