I think dolphin-emu-nogui runs Dolphin without a GUI (i.e. headless) and dolphin-emu-headless is something you just made up based on the name of the setting that is used to turn on and off the building of dolphin-emu-nogui.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
