[setr]

I’m fairly positive the answer is trivially logical equivalence for pretty much any substring operation. I can’t imagine bitwise equivalence to ever be the “normal” use case, except to the implementer looking at it as a simpler/faster operation

I feel like if you’re looking for bitwise equivalence or similar, you should have to cast to some kind of byte array and access the corresponding operations accordingly

[arcticbull]

Yep for a substring against its parent or other substrings of the same parent that’s definitely true, but I think this question generalizes because the case where you’re comparing strings solely within themselves is an optimization path for the more general. I’m just thinking out loud.