The physical appearance of each model is also similar, though again the PSPGo departed somewhat from other models.
Sony has since discontinued the PSP line, replacing it with thePlayStation Vitain 2011 and 2012.
PSP-1000
The original Sony PSP model, it was released in Japan in 2004.
Compared to its successors,the PSP-1000is chunkier and heavier.
It has been discontinued, so you will only be able to find these secondhand.
PSP-3000
The PSP-3000was released in 2008, following closely after the PSP-2000.
The PSPGo also has a smaller screen.