The stats from the article says the following

The war had destroyed 4.8 million housing units. As a result, 13 million Germans were homeless. And there was 400 million cubic meters (14 billion cubic feet) of rubble to clear.

The degree of destruction varied regionally. In East Germany, 9.4 percent of pre-war housing was destroyed. In West Germany, the figure was 18.5 percent. At state level, the distinction is even starker: in Thuringia, only 3 percent of houses were destroyed. In North Rhine-Westphalia, it was close to 25 percent—and even more in the industrial heartland of the state.

Of the 54 largest cities (>100,000 inhabitants) in Germany, only four survived without significant damage: Lübeck, Wiesbaden, Halle and Erfurt. Worst hit was Würzburg (75 percent destroyed), followed by Dessau, Kassel, Mainz and Hamburg.

Over 70 percent of the largest cities had their urban core destroyed. Worst cases: Dresden, Cologne, Essen, Dortmund, Hanover, Nuremberg, Chemnitz.

Of the 151 medium-sized cities (25,000-100,000), about a third lost at least 20 percent of their housing stock. In Bavaria, Thuringia and Saxony, most medium-sized cities managed to make it through the war with little or no damage.

The German bombing campaign focused primarily on decapitation of the nazi german industrial capacity through indiscriminate bombings of industrial manufacturing centers with civilian targets being acceptable collateral damage.

In the Japanese bombing campaign, and every subsequent bombing Campaign in Asia, civilians centers were the targets of indiscriminate bombings alongside industrial manufacturing centers.

There is a clear racially-motivated difference of levels of mass slaughter perpetuated by the western powers during the war.

Side note: it's actually pretty interesting article you shared since it quietly pointed out that the Soviet side of the rush to Berlin was remarkably less destructive than the westerner side.