[JaM]

1. Spall liner protects infantry inside M113, it more RPG resistant than Stryker, with add on armor from Israelis could be RPG imune, M113 is better agains IED, antiinfantry mines cant stop it (stryker will be stopped - mobility kill)
2.72km/h is not slow,With tracks you can go offroad even in bad terain, stryker cant.
3.Fuel comsumtion s not so high as you think
4.better protection compensate this.
look at thelink posted there...