Real close between SNES (CT and FFVI along with Super Mario RPG) versus PS1 (Final Fantasy 7, Suikoden 1 and 2, Xenogears etc.)
PS2 has tons of RPGS but outside of SMT: Nocturne, Persona 4 they don't have as much uber quality titles. Suikoden V was great but still no where close to the first two.
It's just that simple.