Which render is more accurate to PSP (for games LCS and VCS

[LunaMoo]

Most simple games without bothersome effects and that includes GTA I guess, should all work the same assuming your drivers for particular API aren't broken.

Overall I would stay away from D3d9 backend unless you're on some old integrated intel graphics as some things are simply impossible to emulate using it and if possible stick to Vulkan as most new features comes with Vulkan. There are some depth related issues that might not work in all backends the same way, but it only matters for few problematic games.

Overall on windows based pc's we would grade it from best to worst: Vulkan, D3d11, OpenGL, D3d9.

Software renderer is worth mentioning as opposite to some older emulators in PPSSPP it exists mostly for testing hardware api's issues and it's often the least accurate(and awfuly slow), should not be used for playing games outside of some homebrew which might not render anything under hardware api's.