Kounta is particularly well suited to small to medium sized hospitality businesses. It has a great many number of add-ons and integrations that enhance the user experience and its general usefulness from a back end perspective. For example, there is the ability to program automatic menu surcharges for certain circumstances, such as public holidays. It also handles bill-splitting well. It could possibly be less appropriate for venues that need extremely detailed sales data, or for those venues that have very complicated menus or ordering options.
If you run a retail store, or need to setup a retail store quickly and QuickBooks is your Acounting software of chouice, their POS System is a perfect choice. Given the fact that they are both interconnected and created and maintained by Intuit, it's a no brainer solution.
We moved from Vend to Kounta because of Kounta's enhanced functionality for the hospitality domain. Vend was, at the time, more oriented towards the retail industry and so it lacked key features that would have allowed our business to grow and become more efficient. Over time, Kounta has continually improved and adapted to better suit its customers' needs.
I feel like all of these products have their own advantages and disadvantages. I feel though that QuickBooksPOS is especially beneficial when paired with QuickBooks Accounting Software creating a combination paired from a single vendor as opposed to multiple vendors and managing integrations that may or not break between release cycles.