[vladvasiliu]

I was thinking about cooling, but basically they all have either two or three fans, and among those they look the same to my admittedly untrained eye.

[yourusername]

The manufacturer can use better fans that move more air and stay more silent. They can design a better vapor chamber, lay out the PCB in a way that VRMs and RAM gets more cooling. But still all that stuff should not account for more than $30-50 markup.