Hi @naiad ,
At the moment there is a lot of difference between the two methods. For simple distribution of grass, with possibilities for random rotation and size, Geometry Nodes is the better choice, but Particle Hair has some other advantages; it has Children and with those come Clumping, Roughness and Kink. Also the Particles can be influenced by Forcefields (Wind, for instance).
So, it is possible, that this Course will become outdated in the future, but for now it is still relevant.
