ePSXe 2.0 runs better than Retroarchs PSX core on my laptop. I have a 1.5 gHz AMD with 512 megs of vram and Retroarch is too slow even with no shaders. ePSXe 2.0 I use the GPU core 2.0.0 video plugin and Hyllian or Lottes shader without issue, games run @60 fps. I have not messed with Petes OpenGL 2.0 video plugin much but it seemed to run just fine when I did mess around a little. I only use the other video plugin because I only care about the 2D sprite based games and it gives me the look I like.

But like I said, ePSXe 2.0 runs much better than Retroarch and I have seen some charts comparing accuracy and supposedly ePSXe 2.0 is a tad bit more accurate than Retroachs Mednafen core.