The function of a sink basin in a guest powder room is different than the function of a sink in a master bathroom.  Since powder rooms are frequently smaller, they will require a smaller sink and since they are only used for hand washing, the depth of the sink is not an issue.
Sink basins in a master bathroom are used for shaving, face washing, and teeth cleaning –all tasks that are better performed in a deeper sink.  Storage might be an issue in both kinds of bathrooms.  The absence of bathroom cabinetry to store toilet paper or cleaning accessories might dictate the selection of a vanity cabinet style bathroom sink basin.  If storage is not an issue, a stylish pedestal sink is a possibility.
Before searching for either style of basin sink, you need to determine your plumbing requirements.   Unless you are planning a major bathroom remodel where fixtures will be moved, your plumbing piping will remain in place.  While most water supply pipes are located in the walls, some come up through the floor, which would eliminate most pedestal sink basins from consideration as the unattractive piping and water connectors would be visible.