Clock speeds are hardly comparable. GP2X uses an ARM9 processor, whereas the SCDS2 uses a MIPS processor. There is a difference in RAM (I can't find how much RAM the SCDS2 has, but I bet it's not the same as the GP2X's 64MB, and probably at a different speed also).sorrycostello said:GP2X is dual core 240mhz, should be comparable to the SCDS2's 360mhz + the DS's internal 2x 67mhz.
All in all, there are so many significant differences between the two, it's impossible to make a straight comparison based on clock speed. SCDS2 could be faster or slower for SNES, but we can't really tell until the emulator comes out.
Hell, hardware aside, one emulator could be better optimized than the other. Just look at the state of SNES emulation on the PC: BSNES has ridiculous hardware requirements compared to SNES9x or ZSNES, but even among the two fast ones, they share pretty much no code, and aren't likely to have the same level of performance on a slow enough machine.