Is Raspberry Pi GUI PIXEL based on LXDE or XFCE? I found some commands starting by lx* and some xf*. Because there are more commands starting lx* I gues that LXDE is right answer but PIXEL shows more like XFCE.
On what environment is PIXEL based?
PIXEL is based on LXDE. The designers have remodeled the whole UI by creating new icons, windows and buttons to make it aesthetically pleasing.