Speed is the headline. plz12345 already found the real story underneath: same hashes, only the template moved.
If the weights are byte-identical and just the chat template changed, that is still a real fix. The template is what decides whether function-call args parse. But it means every quant and the bf16 should improve together, not one more than another.
So the receipt that matters isn't 're-download the GGUF'. It is the same weights, old template vs new, tool-call pass rate before and after.
On one quant, how much did tool-call accuracy actually move between the two templates?