I didn't read the manga till now because I wanted to compare the Manga to Anime to Netflix adaptation, just in case I was in the wrong.
NOP... Netflix adaptation SUCKS BIG TIME!!
If you haven't seen it, just don't waste your time like I did.
Yusuke is 17 years old at the begining.
No saint beasts (but those worms that infect people)
The relic sword that Hiei stole grants a wish ( Almost like the mirror, I guess - Don't know, my brain when dead when I saw it ) that gives him his Jagan Eye - Yes, that how they do it. -
No Genkai disciple tournament (They - Yusuke and Kuwabara - just pop at her temple and she goes "Are you going to stay outside? Come in" - Yes, Kurama doesn't train Kuwabara)
Yukina rescue becomes a mix of that and Dark Tournament...
Do you want me to continue or are you already quite disgusted?