QUOTE(DaveC @ Jul 15 2006, 12:44 PM)

If you watch closely the DS one runs alot smoother than the GP2X one though. It looks like it is about FS0-1 while the GP2X one is noticeably jerkier at FS 2-3. I would bet the GP2X one is OC ed to the max too. The DS one has alot of graphical glitches but seems superior in frame rate. Not too bad for a 66 MHz machine. I would probably explain that as the DS having true sprite and tile hardware, and maybe more efficient code. Is the DS one a port or a ground-up emu? If the GP2X had a from scratch emu (no one ported from PC sources) it would probably be smoother than the DS though.
You've never actually used SquidgeSNES, have you? At about 240 MHz SMW runs at a consistent 60 FPS, SUSTAINED. Not jerky, 0 frameskip. And it runs almost exactly that with the default 200 MHz clock. The whole difference between the two is definitely the efficiency of the video emulation... in speed and in terms of graphical accuracy and compatibility.
The DS' CPU is a 67 MHz version of the same architecture the GP2X's ARM920T uses, but it has the advantage of most likely being able to offload multiple graphical tasks to the DS' specialized graphics hardware-- e.g. probably scaling, rotation, and maybe even transparencies.
Were we to manage to convince GPH in the future to sell GP2X units with an enhanced MMSP2 (courtesy of MagicEyes's custom SoC services) with MES' 2D accelerator unit, I don't doubt it would meet or outperform the DS' abilities to perform these graphical duties. They could probably add these to a later revision of the '2x while staying pin-for-pin compatible MMSP2-wise. The issue is probably money; if GPH can afford to order custom MMSP2s (I have no concept of MES' pricing system. It appears to not be published anywhere.)
The XGP units might provide these benefits via the 3D processor, but I am trying to convince them to include the 2D one as well. Odds are they don't bother, but time will tell.
In the meantime, the best solution would really be fully-ASM graphics emulation code and (ideally) sound as well.