Ah I’ve looked into this previously. I was going to go with the translation patch, as I’d heard the 4MB patch only really affected the menu loading time? I’ll need to check it again.
There are a two which I would check out.
YZB 4MB patch:
CD layout has been optimized.
Disk-reading slowdown has been eliminated by preloading data to a 4MB ram cart.
Smoother character animations, you can now skip cutscenes.
Paul_met / Meduza Team patch:
Restoration of translucency of many objects;
English translation of some elements;
Direct access to the global map;
Finalization of the global map;
Restoration of the original proportions of some sprites;
Removing horizontal black bars of the screen;
Skipping videos and dialogues;
Access to Richter’s alternate costume;
Reduced loading time;
Support for 4MB expansion card
Removal of 480i menu
I've tried both and the Paul_met patch plays quite well but seems to have a few visual glitches, at least on my saturn.