Like the OP, I was familiar with AD when I bought CS. I like CS and it serves me well for the type of boards I do - typ 4 layer, low frequency, medium density SMD.
Libraries and schematics are directly compatible (both ways) between AD and CS. For PCBs, you have to export from AD in PCB5 format and import to CS - you lose the 3D step models but only takes a minute to update the parts from the libraries to restore 3D models and the 3D views are just as good as AD. This process is OK for one offs but if you are working regularly with other people using AD for PCB development it becomes a pain.
The feature I miss most is outjobs. CS outputs are more limited but it gets the job done.
You might also miss trace length matching, scripting, object selection by query string.
Also, do not expect CS features to be under rapid development! The most notable feature added in the last two years for me was layer sets, nice but not exciting.
You gotta accept that CS is not as well featured as AD and whether CS is suited to you depends on your expectations - definetly run the trial.
As I said, I like CS but am just pointing out the negatives so you are forewarned. If you can accept the above then CS could work well for you.