@kanser: The n9 has better specs (quite big difference).
The PSP uses one 333 MHz MIPS32 R4000-based CPU and includes 32 MB RAM. In comparison, the n9 has a 1G'Hz ARM Cortex-A8 CPU and 1GB of RAM. You can read the wiki pages of the two for more info.
However, you can't really compare the two as they are used for different purposes, one is a portable gaming console and the other is a mobile phone. (Other than that, they alsp have diffrent CPU architectures that's why emulation is required).