The major difference between a regular dishwasher vs a built-in dishwasher is that the first one is a temporary fixture and the latter one is permanent. A regular dishwasher model is a freestanding one which involves no specific plumbing work. It all requires adjusting them to your kitchen faucet and start working. However, a built-in dishwasher comes with advanced wash settings which you can customize as per your needs.
There is no need to rinse the plates before placing them into the dishwasher. It is advisable to clear any leftover food particles from the plates before placing them into the dishwasher.