My money is on the PSP. That machine managed to compete with the best selling handheld in the world. I don't think the XBone can put up that kind of fight, specially if most games are going to be multiplat and looking better on the PS4.
Also, the PSP might just have the most well balanced console in terms of sales: It sold around 20 million in every region, while the XBone is only going to shine in North America.










