My son has FL Studio, as well as Sonar, and he creates beats in FL Studio (frequently, but he goes between it and Sonar quite often), but he LOVES mixing in Sonar much more than in FL Studio.
He is currently in Audio Engineering School, and even though the school and studios are thoroughly Pro Tools, they also use multiple DAW systems to do various tasks, because they like some software for some things and other software for others.
All of them are tools - like different mics or amps or guitars or picks or keyboards or cords or interfaces or life.
I happen to have grown up with Sonar, since the Twelve-Tone days and DOS, so I learned the workflow and feel of Sonar, and since I am primarily a keyboard player, Sonar fits me very well. My son likes the setup and UI for making beats in FL Studio, and for that set of tasks, he finds that works well. Use whatever works for what you like or need to do, and lots and lots of folks end up with multiple recording software suites from different vendors.
Bob Bone