1440x is a thin raster, it is expanded on playback. To fix this you would need to convert it with compressor to full raster.
There are 3 things that must match, Resolution, frame rate and codec. So when you do the resolution make sure you are matching the codec also.
I don’t know about the cameras, but I did a quick check and the specs for the 10 said it did 1920x.
All that being said, matching cameras for multicam shoots is a much better, cleaner way to go.