the differences between Small and Larger ( older) micro Comet nuclei

This video shows us that there seems to be differences between large (older)  and small micro Comet nuclei after splitting one small nucleus, 
The smaller nucleus takes a different direction probably due to the assumption that is did not have already a massive shell of ice around the nucleus and as a result it point its plasma tail away from the local wind direction pushing the nucleus against the wind!
Also seems clear that the small nucleus produces no visible gas/ plasma tail already .