There difference between a liveaboard lifestyle and a cruiser lifestyle is a hard topic to tackle. It is like comparing how you live to how your neighbor lives, or some random person on the other side of town. In a most general comparison, there are some distinct differences though.
A liveaboard you will be more static. Yes, as a boat owner you will probably travel on weekends, holidays, vacations, etc. For the most part though, you will be tied to a dock and live day to day in the community you call home. Your lifestyle would be typical of the community you live in. You would be doing the same things you do/did while you lived on land, you would just do it in a boat.
Typically, this means you also have a 9-5 job, having friends and coworkers that you socialize with, and certain habits and routines that you do day to do. The means after work, when you go out you spend time with friends, family, or when you stay in you are watching television or movies.
These things are very different when you start living the cruising lifestyle. As I noted you don’t have a typical job. You your work hours can become dependent on what time zone you are in, or randomly where you schedule time. You will still have friends, but those friends are in the cruising community and you will spend time with them periodically when you bump into them. Even going out becomes different. You will be in different locations and will be hanging out with other cruisers and locals you barely know.