As notebooks are difficult to cool because the components are housed in a small space, the keyboard has an air intake to improve heat capacity and heat dissipation. You can find more details here: https://de-press.acer.com/243855-jet...
It may well be that we purchase the two models from different suppliers with different purchase prices. Although we then calculate our margin similarly, there may be differences in the sales price. In this case, I would of course choose the cheaper product.