I have a 32 MB DDR Radeon and a voodoo5 5500 agp, tried them both out in P3-450 with 192 mb of Ram.
The voodoo5 is faster at high resultions in every game except Quake 3, but the voodoo5 has better grphics quality in q3 than the Radeon. overall the voodoo5 has better graphics quality in 2d, and 16bit or 32 bit 3d. I notice the Radeon's 16 bit graphics quality is better than i expected, but the 32 bit graphics quality is worse than I expected.
the card is stable, with very few lock ups or crashes in games, but many games have graphics glithes, 32 bit has more problems than 16 bit which seems odd to me.
Also quick time picture viewer no longer works with the radeon.
so I feel the voodoo5 is a better more round card than the radeon, but the radeon cost less