nikeman wrote:
The Streak 5 is specifically designed for the marathon and is going to be a lot more forgiving. The Flyknit Racer has a much firmer midsole. Width won't be a factor between the two shoes as much as cushioning. It depends on how fast you are and how much you weigh as well. I wore the Streak 5 at CIM and had zero problems with them. I wouldn't wear the Flyknit Racer in anything longer than a half marathon. If you're light and light on your feet you may be able to get away with it.
this response is perfect.
to follow up on ur question about having a wider foot, the two shoes are very similar in shape but if anything i find the arch area is a bit more aggressive (ie narrow) on the flyknit racers. if ur foot is truly wide stick with the streak 5. both are awesome options