GPX2 appears to be the next GP32, in terms of both design and spirit. XGP appears to be something different, more like an attempt to create a Korean PSP.
Personally the XGP makes no sense. It seems that GamePark's splitup was between the pro-homebrew and the pro-commercial executives. So XGP is the new commercial gaming system, and GPX2 is the new homebrew system. Good luck to XGP, but with PSP on the block it's going to be a tough road to travel. GPX2 on the other hand, has a ready and willing audience already among the pre-existing GP32 crowd.
GP32 was originally intended to be a commercial game system but with extra features as well. People forget, but GP32 launched with a good number of commercial games. But once users adopted homebrew and emus, the commercial development trickled to a halt. The real money is in selling commercial games, so some people at GamePark must've really resented how things worked out - instead of making a lot of money, they only made a alittle money just selling hardware.
XGP is probably intended to change that. So they DON'T want homebrew on XGP, they want to follow their original vision - basically a "Korean Gameboy." Can such a thing succeed? Well, probably not. GP32 didn't, at least not as a Gameboy competitor - instead it became something unique, and possibly unexpected even for GamePark. A homebrew handheld. But how much money is there to make selling just hardware? I don't know, but hopefully enough to keep GPH afloat so GPX2 can become successful.