I took quite a few screenshots of both enemies. When I have more time later, I hope to make animated images of them and add a page to the PSIV section of the site. You can't tell this very well from the screenshots, but they have glowing auras that change color. Here is the first one, from the Esper Mansion cave. It is pretty weak, like the Phantom monsters that also appear there. The second monster (shown below) has three attacks and is much stronger. They are still not very tough, though.
Apparently, both monsters exist in the US game but have been disabled from appearing in battles. The first one is called "Acacia" ("Akasha" might have been a better translation, from what I've heard) and the second "Shadmirage" (or, Shadow Mirage).[br]
I don't have save files from the Japan version on hand at the moment. I usually use save states in the English version, which freeze the Japan game.
If you get a late game save state from the
Downloads, load that on an English ROM, and then save through the in-game menu, you can use the resulting .srm file with the Japanese ROM. I used that to jump ahead to the end of the game.
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I've heard before that the US release contains extra scenes that the JP one doesn't
[br]I've heard that, too. One of these days, I'd like to play through both and find out what was added.