Yep, the 890 kv is a give away, good motor for spinning bigger props at lower amps. Per MotoCalc 12.1 amps, 21oz thrust, and a prop speed of 43mph. Now that said, M/C is saying 8130 rpm at top speed as the prop unloads. Also 83.3 watts of power.

Like said, watts are watts, how you get there is up to you and your equipment. Say a 10 volt system at a 10 amp draw is 100 watts. So is 20 volt system at 5 amp draw.
Ditto changing prop pitch and diameter, you can change the flight characteristics and still keep similar watts.

Going from the 10 x7 to say a 9x9, drops the amps to 11.4, thrust goes down to 15.9, prop speed goes up to 58.3. Watts 82.2

Similar watts, but a lot more speed with all the rest of the equipment staying the same.