I just got a Supercard DSTWO and it's pretty awesome. I'm totally new to this flash cart thing though, and I'm just wondering what something like the R4i, which is half the price of the DSTWO, can do.

Does the R4i run DS games as well as emulators such as NES, SNES, GB/GBC, and GBA? Why exactly is the DSTWO twice the price?

Thanks in advance.