Radiant Historia is a DS game made by Atlus (with the involvement of the folks behind Shin Megami Tensei and Etrian Odyssey
). Radiata Stories is a PS2 game by Tri-Ace. Unfortunately I haven't played it yet, but I hope to get a PS2 someday.
REALLY?! I never played it yet but in Radiant Mythology other characters of Phantasia are there too.
Once, it was one studio
Wolfteam. They made a few interesting games like Arcus Odyssey, Aisle Lord, Time Gal and Hiouden, and their last project was "Tale Phantasia" which they made a deal with Namco to publish. Namco, however, did a lot of executive meddling with the game, changing the title, character designs, some story parts and reassigning staffs. Some of the developers were displeased with how their original view of the game was ruined, and eventually left towards Enix to create Tri-Ace studio. The rest of the team decided not to abandon the franchise and concentrated on producing more games, while being promptly renamed to Namco Tales Studio.
Tri-Ace's first game, Star Ocean, was also for SNES and has a lot in common with Tales of Phantasia. It's a marvelous JRPG, rivaling Chrono Trigger and Final Fantasy 5/6 in my book.
I also played its sequel a bit and liked it as much. Not to mention Valkyrie Profile...
I've seen a number of reviews for Resonance of Fate and I want to play it badly.