that money gap is looking pretty scary... but is it worth the High Speed??
Hmmm....I'm thinking you accidentally switched the prices around, because the way you posted it, the highspeed is much cheaper.
And for PSP use, I don't think you need high speed, it would really only be helpful when transfering large files to the PSP. Otherwise, when it comes to buying memory sticks, it's generally best to just buy the cheapest ones, there's usually little difference in quality between the expensive ones and cheap ones.