What's the different between SLOW COOKER, CROCK POT, and PRESSURE COOKER?

a slow cooker is the same thing as a crock pot, you would leave food to cook for at least 6-8 hours to make it all very tender. A pressure cooker is very different, you would use this to cook in warp speed time. If I make pork tenderloin in the crock pot, it takes ten hours on high, if I make it in the pressure cooker, it takes about 45 minutes once it has started "rocking" and the pressure has built up. The pressure cooker can be dangerous though, so be careful using it. I have used it my whole life so I feel comfy around it but it takes a while to get used to. You can't open the lid and therefore you can't stir the food or check to be sure it's not burning etc...The chicken noodle soup would be done in the pressure cooker very quickly. That is the only way I make my soups and they come out awesome. Beef burgundy and other meaty meals would come out much better in a crock pot. I hope this helps.