Robert,
Sounding like from your other post, you are an "expert". All I can say is to try it out on your plane instead of the AXI that's already there.
For the most part, it is hard to screw up these motors (but it can be done!), so maybe it will be a little less efficient than the AXI, but it sounds like you have plenty of battery already.
If you are using a governor already, and if the number of magnets in this cheapie is the same as the AXI, then it really is "plug and play". As long as the kV is in the same ballpark as your AXI 2826/10 then you would be ok. One way to check is to run both motors with a very low load (I have made a plywood disk ~1.5" diameter that you color with a black magic marker to give 2 dark sectors and 2 white sectors. This you can measure the rpm with a tach at wide open throttle. kV is basically the rpm/battery voltage. You do need to run the throttle full open to make sense of this measurement. I include a photo before of my test stand.
What I would look at is how much you have to put back into the battery compared to the AXI. I assume you will need a bit more than before.
I am also guessing the bearings are crummier than the AXI, so they may not last as long as the ones on the AXI.