The Streak 7 has the 4G built in, and so it would be cheaper to go with a stereo Bluetooth headset ($60 - $70) than the Samsung phone (just under $200). I don't want a contract given how things are going in this space, and so that's actually one of the cheaper phones with 4G.

As for what the Prime might do better, I know that reading Manga scans is a little easier on a 10" screen (whole page at a time rather than a half page), and I presume that the 4 cores will make any editing or web browsing faster. But whether it will do it several hundred dollars faster is a big if in my mind. Ideally I'd get both, try them out for a week, and return the "loser". But that's a bit more than I can afford.