It is in some ways, but not in other ways. They both evolve around the same star and look blue from afar. However, Earth is a terrestrial planet and Neptune a Jovian one. Neptune also has more moons and is colder, while years take decades of earth-years.
That sounds like an excellent math experiment - see how many quarters it takes to fill one inch of the can - then multiply out how many inches tall the can is so you can know about how many quarters it will take to fill the whole can!