Radials are stronger laterally, which will give you added stiffness in sprints etc.
"Since the spokes are directly in line with the main force vectors that shape the wheel, a radially laced wheel is stiffer and has greater lateral strength than any cross pattern."
Exactly. That is why many modern rear wheels use a radial spoke lacing pattern on the left non-pulling side. The only reason to cross spokes is to permit the transfer of forces from the hub to the rim. Even on road bikes with front rim brakes a radial pattern can be used, however, it's a definite no-no with hub-mounted brakes.