So, I'm playing FFII on the PSX. (Final Fantasy Origins)

Now I've played the GBA and PSP versions but from what I can recall, it seems that on the PSX version, it takes a much longer time to level up you magick attacks. Is this true?

I've just started with equiping a tome to a character and they learned there magick but I cast and cast and cast some more but I've only leveled it up to two... I've leveled up magicks much faster on the other versions. Or, did it just seem that way?

Are there any other notable changes I should watch for. (Other than really bad translations on the PSX version)