Just on the N64 vs. Playstation ...
Check out the games for both systems ( N64: http://ign64.ign.com/ Playstation: http://psx.ign.com/ ) and it should be very clear that, in real world performance, the N64 was significantly more powerful than the Playstation.
Edit: On top of this, the argument about the Playstation being able to calculate more polygons is entirely false; the Playstation did not have dedicated 3D hardware and was at a significant disadvantage.
There was an old argument that the PS2 was better able to calculate raw polygons than the Gamecube but that was based (almost entirely) on the technical specifications released by the companies. Nintendo claimed that the Gamecube could produce 12 to 15 million polygons per second in game (which it eventually did), and Sony claimed that the PS2 could produce 66 million polygons per second even though the best PS2 games only achieved 10% of that.
