MTP and QTA - what is the relation?

I'm an old guy and I hate when things change so fast surrounded by noise and breaking news!
MTP, I know what the acronym means and where it excels.

Gemma4 31b dense is my target.

Unsloth, Google, GUFF, tensors... too many overlapped informations. I hate when I see no clear path.

Please help me...

FACT 1 = MTP has been merged in llama.cpp
FACT 2 = old GGUFs are not compatible
FACT 3 = I need a second file to load with the GGUF

Is fact checking ok?

Which GGUF is ok?
Why Unsloth added "QTA" magic string to its filenames with no clear relation to use cases?

Don't point me to hf/SomeRandomUsername/gemma4-31b-it-SomeRandomShit because I do not want to test some random GGUF.
I would like to test the baseline/official asset to make my opinion.

I'm not a bad person, but now internet, blogs and forums are like an Istanbul bazaar where every step you have to skip a scam/ad/shit.

Peace.

--- edit ---

QAT, not QTA.
That is the proof I'm not a BOT, lol...