For performance we will start with the PC. The PC you can switch the parts out for new ones that come out so if you had enuf money you could theoretically have the best pc all the time and because of the ventilation the parts wont get harmed as much. For the laptop you can't switch  out parts if you want a better laptop you have to buy a whole new one and because of the restricted ventilation the parts will harm the components which will make to run slower. So the PC wins for preference.