Same formula, but no two dispensers are often tuned the same. The ratio of concentrate/water/carbonation are manually adjusted by the technician setting up the machine and can vary. Unlike a can which is mixed at the factory, all the elements are mixed on site at a soda dispenser and the retailer receives a 5 gallon box of concentrate that can serve hundreds of drinks.
...ever get a watery coke at a restaurant...that is why.
Although with Coke's sponsorship, I would be willing to bet that the resorts dispensers are tuned the best they can be!