A naive check using https://psxdatacenter.com. A bit easier to check if they match as igdb will use the US title but that also meant a lot more checking and certainly a lot more creation of new games to the IGDB database so if games are empty that may be why.

I'm a bit worried deleting stuff is double deleting so let me know If I'm missing anything
I made these lists with no planning on a whim so I have not checked it at all. Here is the brother list: https://backloggd.com/u/bitterbatterdog/list/-ps1---ntsc-u-games-not-available-in-pal/