In the first benchmark it gets a ratio of 4 instead of 2.7, fitting 36-40% more data with 75% more CPU. It looks great.

The next two show it fitting 20% more data with 2-3x the CPU, which is a tougher tradeoff but still useful in a lot of situations.

The rest of the post analyzes the CPU cost in more detail, so yeah it's worse in every subcategory of that. But the increase in compression ratio is quite valuable. The conclusion says it "provides the highest compression ratio while still maintaining acceptable speeds" and that's correct. If you care about compression ratio, strongly consider zstd.