I prefer to put fewer buds in each jar. If you go into jars a bit too soon and fill your jars you increase the chances for mold. There is so little air in the jars for moisture to evaporate into that you are more prone to mold problems than with fewer buds. In both cases you do need to remove the tops and air them a bit but you have more leeway with fewer buds.
Another reason I do not like to put more buds in each jar is the more you pack them in the more they press against the sides of the jars and the more they press against the sides of the jars the more trichomes that will break either by pressure or rubbing when put in, taken out or moved in the jar, as they should be occasionally, and less trichomes end up sticking to the inside of the jars leaving their inner goodness behind when removed.