Probably the SNES, but not for lack of trying on PS1's part.
Most stuff on the PS1 was hugely experimental, which really hurt the overall presentation IMO — you can have quaint little adventures like Threads Of Fate (which was silent and weighed around 50 MBs) or huge cinematic experiences like Final Fantasy VII.
It was pretty hard knowing what you were getting into on PS1, whereas you always knew what you were gonna get on SNES — and, at that point, the only measurement left was the actual quality of the story contained within each cart... which, for me, was a much better deal.