It sounds great and if it doesn't for you its likely that it is not setup right. The CL is at version 1.0.1 BTW.
Too compare Boost 11 to the CL is like a Tanka toy to a real truck.
When CW added it it was due to some members asking for it because they saw it in Home Studio or some such. Yes CW did offeris for sale but they had no plans to include it with Sonar until the forum erupted over the issue. It was not a good quality limiter but meant as a cheap free included plugin for their lessor offerings. Much like the Studio Instruments.
My thought as a joke was to call Boost 11 the Spinal Tap plugin.
The Concrete Limiter is completely different and is meant to be used like most PC modules on every buss and track if needed. It is a low CPU user yet is of the very highest quality.
It is my favorite PC module.