I'm not sure what you mean on the 1st pic by "same stats" ..? Both players had identical stats, play style & height ..?
Also, if you change the Skill Mode, the skills will be remapped differently and thus it'll give a different CRC.
If you don't have exactly 780 points left, skill remapping will occur as well ; normally, the result should be always same, but maybe it can be slightly different depending if you host or join or some other strange stuff.
Note: that the CRC changes a lot or a little, gets bigger or smaller, etc..., doesn't matter ; the important thing is that it changes or doesn't change...
so same skills & parameters = same CRC ; different stuff = different CRC.