I like the looks (at least in pictures) of the CX-3 better than the 3.
I like the interior, at least in pictures, of the CX-3 better than the 3.
The 3 has a bigger engine as an option, and a manual transmission as an option, and with a lower center of gravity it should be more fun to drive.
I need to drive them both.
The 3 apparently has more cargo room in the back, and I know that holds true with the seats UP, however, not sure if that still holds true with the seats down. I'd be interested to see how the two compare with the seats down.