Its not incredibly better, pretty much everything on hos is optimized specifically for hos and is supposed to run better. BUT some stuff runs better in lakka (mostly compatibility wise) and the performance overall is also great (you won't even notice the difference most of the time). Plus the possibility to run a lot of gamecube games. I mostly use lakka when it comes to emulation, i just like that it runs everything i need and i don't need to hop between the OS's to play certain emulators. Imo lakka is worth using and has always been especially when you consider that you don't need to partition/format anything. But at the end the choice whether to use it over hos or not is pretty subjective.