Yes, that's right.
For play purposes, CMO is quite similar to CMANO, and you should have no difficulty transitioning from one to the other. There have been a few modest changes to the user interface, but nothing that will prevent you from recognizing what's going on, or playing like you did before. The biggest single change you will find is that it runs much more quickly and smoothly for large scenarios, which is very pleasing, and there is also the option to set up a Tacview interface (a separate product), to see your operations in 3D. There have also been a large number of incremental improvements in everything from mineclearing, to doppler radar performance, to troop transport, to aircraft flight models, missile guidance modes, and on and on. Far too many for me to list!
So if you would like a game like CMANO, which runs quicker, smoother, and simulates many features in more detail, then I think you will enjoy CMO.