PEQ is fine
No. The settings in the jaakkopasanen/AutoEq Github repo are generated using the AutoEq software. AutoEq uses measurements by Oratory1990, Crinacle, Headphones.com, etc, but the presets are created by software. If you install the AutoEq software you can create your own presets using the same measurements but different parameters such as the target you wish to achieve.
The Oratory1990 presets are based on his measurements and are created by him. He is not affiliated with the AutoEq project. He uses the Harman Target unless otherwise noted. In general I find these presets to be much better than AutoEq. YMMV. I have since moved on to creating my own presets.