I thought also, that delidding the 9900K give only a small Benefit in temperatures, but i might be wrong.
Regarding the cooler, the Blackridge is a 95W cooler, while the Cryorig is a 115W, which makes sense, because the Cu model is a full copper "block". I don't think the cooler is the issue, but the case airflow. I will test that by simply adding one or two 120mm fans on the outside of the CPU chamber and see, how much the CPU temps are benefit from that. At best, he fan on the Cryorig does no longer gets that loud / high rpm.