The PS1 original was good, but it had some noticeable flaws. The book writing skill was more or less useless, side quests were often too well hidden from view (which was especially bad when most of them were time-limited), the accessories that gave you items were a bit in-your-face, there was no in-game mini-map, the invisible random encounters and lack of fast travel didn't age well, and the voice acting… What were they thinking when they released this…
The remake fixes most of what went wrong in the original game, including re-casting the English voice actors, and even adds some new content (like fishing) that wasn't in the original. I'm enjoying it a lot.