Landing and takeoff are very different regimes. For landing you are touching down between 1000-1500 feet from the threshold whereas for takeoff you are rotating midfield (or so). If the above quoted numbers are correct, then they were 4000 feet down the runway with 8000 feet left. A classic 737 at DEN with a full load probably has a V1/Vr up around 145-155 knots. Whereas it probably had a landing speed around 135 -145. So, land at 140 with 11000 feet left and decelerating or abort at 150 with 8000 feet left and accelerating. They seem quite different to me.
The "same runway you landed on and same speed" is simplistic at best and dangerously naive at worst. I'm making no judgments or statements on this CAL accident as I know no more than the mainstream press has reported.