I have the playstation original and haven't touched it yet probably not interested in this version
Your call, but the original is so massive and clunky that I can't imagine this not being the definitive version.
(Although that could just be my lack of faith in OG Playstation hardware due to failures which caused me to not finish the PSX version of the game when one of my memory cards got reformatted to make room for an Inuyasha fighting game save file. I had an endgame save that was a grind away from beating the final boss on that memory card among other things. Also PSXes suck and overheat causing them to freeze at the drop of the hat. And the ingame CGs of the PSX version were ugly as hell.)
The tl;dr is that the PSX did not age well at all.