Unfortunately the pi simply, even with the 4 is not good enough for correct emulation. Especially when also running a underlying frontend like Launchbox/Bigbox. Dont get me wrong i like the pi, and have a couple myself, but it really is not good enough for accurate emulation, i mean it still uses a 2003 MAME set for example, as well as using very old retroarch cores a lot of the time, or is using hacks like frameskip and others to get a good running speed.