While I'm not Mike or Konsta, I hope that I can properly answer your question and elaborate more on the points @pauliunas provided!
First, for the baseline I'll link you the answer of our official FAQ:
For your other questions: We'll 100% stress-test the V with demanding software to provide you guys with some comparision against the other devices out there.
For tech we use to cool the V please refer to the quoted answer
And I personally believe that UWP apps are usually better when using a Windows 10 device with the touch-input but when you use a mouse/keyboard I feel that x86 apps are more useable. But that is just my personal opinion