What is the difference between track pieces and human hair extensions?

Tracks-fake hair

Human Hair- real hair u get sewed or glued to your scalp

What is the difference between track pieces and human hair extensions?

Hair extensions are tracks, but tracks could be fake to. When I say fake, I mean you can't really style it by putting heat on it. Human hair, you can do whatever to. I always go for human hair. I costs more but last a lot longer.