liberty city and vice city stories on PSP

[TheStig1]

i am quite bored of my ds and thought might trade it in towards a psp
mainly for these 2 games in title only thing is are they just ports of the normal games or are they all new missions and storylines and are they good enough to warrant buying psp just for them?

 

[TheStig1]

thanks think i will go for the psp anyway as the ds is not being used at all
any other good psp games i should consider?

 

[TheStig1]

well i went to get the psp today but instead got a ps3 lol