I absolutely agree with the fact that Chrono Trigger is the best square RPG ever. At the time I started playing CT I was actually in the middle of FF7. For the next 3 weeks, I was glued to my inferior SNES enjoying the finest game the system has to offer. When a game on an older platform can pull you away its flashier counterpart, it is truly a testament to it's superiority.
Let's start from the beginning. FF7 had it's nice CG and shaded poly characters, but CT had art from Mr. Dragonball himself. Any programmer can make CG and polys, but not everyone can draw Dragonball. Next we have the music. After FF3, I believed Uematsu was unequivacally the greatest musician in the gaming industry. But then I sat through the flat tracks that was the FF7 soundtrack, and I was disappointed. There were a couple of bright spots, but not enough to overcome the rest. I bought the CT soundtrack, 'nuff said. FF7's story was a letdown as well, especially after the epic FF3. It was even weaker than the original FF and FF2. CT's story was one of the best ever. It was time travel done right, and MULTIPLE ENDINGS to boot!
The one area where FF7 excelled was gameplay. There's no question that Square peaked with the materia system and limit breaks. The gameplay was the only reason I finished the game. CT was great in this department as well, but nowhere as deep as FF7.
Overall, CT was Square's finest work. I neglected to mention FF8 because I've yet to finish it. But I can say it's presentation is second to none. Although FF8's great, it's not likely to top CT. As for the greatest RPG EVER? It's got to be Panzer Dragoon Saga. For the few who've played it, you'll understand.