Only you can determine that, but understanding the difference between the two can help you make an informed decision.
A wedding planner does more leg work for you — from helping you with reservations, coordinating with suppliers and overseeing the logistics of the ceremony.
A wedding coordinator only comes in a month or two before the event. Her primary purpose is to save you from the stress on your wedding day, but most of the work leading to that falls on you and your partner.
Wedding planners typically cost more than coordinators because they provide more extensive service.