A floor jack and a bottle jack both have the same core function of lifting your vehicle so you can place it on jack stands. Depending on your own preference, the specific task, and the type of vehicle, you may prefer one type of jack over the other.
Floor jacks, across the board, are the more expensive option. They also tend to be more user-friendly. Because the design of a floor jack is flatter and wider, it works well with low-clearance vehicles. They also tend to lift the vehicle quicker. Along with that, floor jacks often have wheels on them for ease of movement, as they typically are heavier and more awkward to move around than bottle jacks.
Bottle jacks tend to be the cheaper option. This, however, does not mean that they are low-quality. In fact, they tend to have higher weight capacities. Because they are much smaller than floor jacks, they are easier to transport and store when not in use. Due to their vertical, bottle jacks may not fit under your vehicles, especially if you have a car with low ground clearance.