Same course different price

I stumbled upon a course over ThemeForest ‘Mobile Apps With Ionic and Firebase’ for 5$. then i saw the same course over tutsplus and there it cost 9$.

is there any difference between them?

Nope, no difference. The course price on Tuts+ has always been the same. But on the Marketplace they differ depending on their demand. Most people who use the Marketplace, don’t use Tuts+.