Hmmm I doubt a Trident video card with a mere 16MB of RAM had alot of acceleration going on. 
Even the Gamebube (G3) @ 487MHz could do it. ;-)
http://en.wikipedia.org/wiki/Panasonic_Q
Point is you are comparing apples and oranges, and maybe you are also putting too much attention to clock frequencies? And who was speaking about HW acceleration in video cards?
A G3 is usually faster than a "G2", for some application more than others. AFAIK a Pegasos 2 G3 is faster than any Sam. And a G4 is even faster, especially the newer ones, and especially for applications where Altivec make sense. As a result, MorphOS on a Mac Mini 1.42GHz plays x.264 720p streams better than a Sam plays DVD streams. A difference in work task that is a magnitude greater than the difference in clock frequency (of course other things affects the results as well, such as bus speed, etc).