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#11
They both roughly have good specs (Core i7, ATI Graphics).
Bear in mind, I'm on a discrete model (2006) runs on really slow Core 2 Duo CPU. It originally shipped with OS X Tiger.
The Xperia X8 seems to be a pretty nice phone.
Your PC seems to have specs similar to mine (well, you have a better processor and your GPU beats my current one, but would be similar if I could fit a better PSU into my case to power my better one :P ) so I'm guessing it's not a bad experience on your PC.