Pressure cooker cooks things fast and a slow cooker cooks things slowly. For the best of both consider getting an instant pot which can do both. You've just missed a great price on them on amazon but keep an eye on the bargain alerts forum on here. That's where I saw the offer and bought mine last month.
Definitely go for an instantpot or similar electrical pressure cooker, FAR easier to use than a traditional one which needs more babysitting. The electric ones are more like a microwave with time settings etc.
