Which is better? And if using controller, is aim assist recommended (and what settings specifically)?

I'm looking at the differences now and it seems like it's mostly QoL changes: https://finalfantasy.fandom.com/wiki/Final_Fantasy_IV_version_differences#Super_Nintendo_Entertainment_System

In fact some here seems to indicate increased difficulty "Excluding the Red Fang, all magical based items that could cast spells in battle were removed" "The Alert item, the Summon Book as well as stat-boosting items (Silver Apples, Golden Apples, and Soma Drops) were removed, in addition to the Dark Matter" "Cecil's Darkness ability is removed, in addition to all of the abilities that were removed in Easy Type (see above)."

Is this not a difficulty increase? Abiltiies have been useful being removed and items too.

It's commonly stated that FF4 US is easier than JP but I can't find any info actually validating this

Anyone know how to actually get .lua mods working with Kh2 pc? Followed the instructions here https://github.com/Sirius902/LuaBackend/blob/hook/INSTALL.md

and it doesnt work

Is there anything else required its not mentioning?

Here's a screenshot of my folders to show I followed it correctly https://imgur.com/HQZBoNC https://imgur.com/qjfcydh