Kore board power rating

Would it be more useful to rate a boards power handling ability in Watts rather than Amps? I am thinking of using these boards with on two quads, one with 4x Tmotor MN605 combos and the other with MN6007 combos at 6s.

The docs say:
" * Up to 12-cell Lithium battery (50.4V)

  • 140A continuous current with 280A surges"

Does this mean 140a @ 12s, if so then great it will work with both of the above as ~260a 6s?.. Although I have a sneaking suspicion that its rated at 140a at 6s which means its ok for the mn6007s but not the mn605… could anyone cast any light?