When I use ePXe on my PC, most PS1 games run simply fine, but others like Twisted Metal or Spyro had a few hiccups. I experienced a few framerate stutters and cutscenes that would sometimes fade to black in and out. I ended up using a different ISO for this game and got it to work slightly better, but it did have some slow down issues, so there wasn't one that completely shined over the other in terms of performance.