According to Square programmers about the power of PSX vs N64, (source from the recent excellent article about Final Fantasy 7: http://www.polygon.com/a/final-f

According to Square programmers about the power of PSX vs N64, (source from the recent excellent article about Final Fantasy 7: http://www.polygon.com/a/final-fantasy-7 http://www.polygon.com/a/final-fantasy-7) "I kind of had a suspicion that things weren’t going too well for the 64 at that point, because … one of my responsibilities … was to write performance applications that compared how well the 64 fared against the prototype [PlayStation]. And we’d be running parallel comparisons between the [PlayStation] where you’d have a bunch of 2D sprites bouncing off the screen and see how many polygons you could get within a 60th of a second. And even without any kind of texturing or any kind of lighting, it was less than 50% of what you would be able to get out of the [PlayStation]. Of course, the drawback of the [PlayStation] is it didn’t really have a z-buffer, so you’d have these overlapping polygons that you’d have to work around so that you wouldn’t get the shimmering [look]. But on the other hand, there was no way you’d be able to get anything close to what FF7 was doing [on PlayStation] on the 64 at that time." So, at least according to the square programmers the PSX was more powerful when it came to raw polygon processing power. Of course N64 was doing much more with it's hardware, and also having a Z-buffer for real depth information, so these numbers are not really directly comparable.