I have both. I like the Streak XC 2 for anything 10k or less on the roads. For a half I used the Brooks T6 and they were great man - the only issue being you MUST size up AT LEAST a 1/2 size because they fit pretty small. There may be some people who found they didnt have to size up, but I think 95% of the wearers did size up.
so i wear size 9 in most of my training shoes incl. brooks ghost 2, landreth, asics speedstar4, etc, but I had to go with a 9.5 in the Brooks T6 and even that is pretty darn snug. same with the nike zoom marathoners
hmm... ok a flat that feels like the streak? hmm...
http://www.runningwarehouse.com/catpage-MRAC.html?SHOW=NOBRAND&ctype=comp
take a look there. some ideas? maybe asics Hyperspeed, asics Piranha, Zoom Katana might be good as i hear they keep you on the toes more, possibly Lunar Racer and Streak 3 as well. take a look and see the shape of the shoe. get to a running store and try em on. then order online where you can find the best price. just my suggestion