It depends on the level of committment you are willing to invest.
CS 2.4 are easier to set up and less finicky with electronics. Not that they dont benefit from demoing numerous amps and front end, just not as critical as CS6.
Top to bottom it's a well balanced speaker and at its price point it's a steal.
CS6 takes more effort to properly set up. Getting the correct balance with electronics can be laborious if you dont enjoy the journey of doing so.
Once dialed in with the right electronics the CS 2.4 are outclassed.
The CS6 produce a bass punch much larger than their weight class.
It will take a considerable investment compared to the CS 2.4 to glean the best out of them.
Thats my .02 whatever weight that may have.