Both are made out of the exact same foam from the same supplier. The black hole just isn't quite as deep as the block targets.

On either of these targets I'd reccomend placing a rachet strap around them.. and as they wear compress the target a bit. The bands on both are too loose from the factory.. This makes them easier to pull out of.. but at the cost of longevity... and tightening the rachet strap will make the targets last much longer.