Before knowing about the advantage of customized software, one should know why it came into existence and why all the business owners are looking for customized software. There is always a limitation in un-customized solutions. Even if your business software has unlimited features, you cannot expect profit from your business if those features are not relevant to you.
Similar terms
A PoC and a prototype are used at the pre-product stage and require minimal-to-medium investment. With MVP development, you enter a product stage with core functionalities and features to see how the market receives your idea. Building an MVP requires more time and money than creating a PoC or prototype.
An estimate is a best guess of how much a job might cost. A quote is more exact. Once you've accepted a quote, the contractor has to do the work for that price.