They usually look more regular in shape & surface (not always though). It can be hard to tell because maturation is a dramatic transformation & the full process is not documented for many species. You can see some examples below, in a video by instagram.com/yeweijun98

It is reproducing! It used to be a huge single cell called a plasmodium (see below). It has reorganized into these balls which are full of spores, & they mature by dehydration. Then insects & the wind take them off to have their own adventure

video of a relative from instagram.com/sluzowce.sud...

fungi have their uses