My guess is it’s similar to the electric motors they put in cars vs industrial motors… they can both put out X amount of power but the industrial ones (or in this case the laptop power) can do it continuously without overheating while the other can only output “up to” that power rating for a short time without burning up.
In this case though, the laptop power probably also outputs a higher voltage as well.
I’d love to see something similar to reddit enhancement suite.