xlsior: Perhaps you used OpenGL in both cases, which is no problem with voodoo which is crap with DX but vice versa Rage is unusable with OpenGL but superb with DX :-)
For microscropic values of superb perhaps -- with the Rage I only got 5-6 FPS in DirectX mode as well.
The Voodoo ran ~15 times faster both in DirectX and OpenGL mode, despite having a quarter of the RAM and 2/3 of the CPU MHz in the system.
That Rage Mobility was seriously underimpressive. From what I've gathered some laptops didn't include the 3D acceleration module, so while 2D DirectX ran pretty smooth, Direct3D and OpenGL reverted to software rendering and did a good impression of frozen molasses in a funnel.