The best way to see if CW is for you is to download it, install it and try it. As long as you don't uninstall your existing Sonar set up, you will retain all your previous plug-ins in CW and can always go back to using Platinum (but I don't know why anyone would want to go back to Platinum). Best of all, it's not just a free trial, the full installation of CW is COMPLETELY FREE.
It's a no brainer. I still have every version from Sonar 8 on up installed, but use only CW now, even when modifying sessions recorded in past versions.