M3 GEP is 256M SDRAM included, but no norflash. Some batches of M3GEP have RTC. I guess it is different from 3in1, which is 128M psram+256(or 512)M norflash included and no RTC.
Official ads of M3GEP claim that it supports migrating Pokemon when being used with M3DS Real, so I reckon maybe it...