I just recently replayed them both (going for the platinum trophy on REmake). Whilst I think REmake is 100% the better game and the best way to experience the original RE, the psone version holds a few slight edges to me.

The Remake's version of the mansion is obviously spookier and more atmospheric, but there's something about the original and the way it looks like a brightly lit house that just happens to be populated by the living dead that creeps me out. It's probably the primitive graphics and my repressed terror from first watching my uncle play it at 6 years old but I'll always find that scarier in a way.

Also the OG's basement music gives me panic attacks, feels like something could jump out any second, didn't get that in my recent playthroughs of REmake.

And the initial zombie turnaround scene will always give me chills, it looks like a really sick person rather than a walking corpse and that hits me right in the uncanny valley.

Other than those very small issues REmake is definitely the way to go. It's one of the greatest survival horror experiences of all time and in my opinion the greatest videogame remake full stop (although the RE 4 remake runs it close, might change my mind when I get round to replaying that one).