Ice rink had more friction.
These guys did everything by the book. Maybe the only thing that may have prevented the overrun was a very firm landing. But I doubt it. Back, way back, the Saberliner did not have anti-skid brakes. To check out one had to demonstrate a lose of fifteen knots at touch down. On a dry runway that produced a firm plant, not hard, but firm. On a wet runway it was a smooth touch down. Now the Vref was usually either side of 120. But not even that, would have helped these professionals.