The major factor that distinguishes between the original battery of Apple MacBook and its replacement is, of actually, their price. In the real sense, the difference in the cost of the two batteries can vary from $30 less, and even down to almost about half of the cost or price, it might even be lower. So if you are so lucky to get a very good replacement battery for your Apple MacBook, you would have actually saved yourself some cash.
Another major advantage of procuring a replacement battery for your Apple MacBook is the probability or possibility of getting one, which may have a higher battery capacity than the normal Apple MacBook original battery. With the original battery, one would only get the same capacity. However, a raised battery capacity would cause an increment in the overall weight of the laptop, but then, there is an extended time frame per every charge.