anyone know if there are differences in the upper material between some of the colorways of the Brooks Launch 4?
Can't tell if it's just the colorway, but one looks like a stretchier material and no overlay at the toes:
http://www.runningwarehouse.com/Brooks_Launch_4/descpage-BLN4M6.html
compared to:
http://www.runningwarehouse.com/Brooks_Launch_4/descpage-BLN4M3.html