death by 163 would be plummeting in a ball of fire and explosions. death by roc would be a nice gentle "crash" landing from a low altitude with low speed 8)
You don't have much chance of surviving in either really. By the time the 163 had come around the Roc was TOTALLY outclassed in the air. Combat in a Roc was a ticket to the afterlife. Of course a lot of the 163's died in a fiery explosion on takeoff or landing and that's not much fun either.