Whats the difference between a training prop dynamic and a prop dynamic

[Assassin_Gamez]

So i was gonna make a small area in my map in spawn where there's a shooting range and noticed that there were two types of prop dynamics. I have some models of the wooden class targets so thats how i encountered this, so what do they do and how are they different?

 

[jayden_sly]

 

[Assassin_Gamez]

ah thanks!