They’re non-deterministic and YMMV by design. No one can answer that question. It might save you a hundred million with some genius optimization it lucked into

They’re non-deterministic and YMMV by design. No one can answer that question. It might save you a hundred million with some genius optimization it lucked into or, more likely, it’ll give you a seemingly equivalent query that actually returns subtly different results (easy to do with query optimizations when eg you rely on inherent/default sort order for joins with groups).