I think use google search is not a tough task 
https://coinrivet.com/what-is-the-difference-between-yfi-yfii-yfv-and-yfl/
YFII YFV YFL and YF+other alphabet is just a YFI forks. All of forks is fake, it's just like BTC with BCH or BSV.
After few month(s) later especially when DeFi hype ended, and all of DeFi token got massive crash. Leon Li will react "DeFi is high risk, we only list and not suggest people to buy it"
https://coinrivet.com/what-is-the-difference-between-yfi-yfii-yfv-and-yfl/YFII YFV YFL and YF+other alphabet is just a YFI forks. All of forks is fake, it's just like BTC with BCH or BSV.
I just noticed recently that Huobi.com listed YFI, very cool seems they are stepping it up in the DeFi space.
Yes, it's vERy CoOl.After few month(s) later especially when DeFi hype ended, and all of DeFi token got massive crash. Leon Li will react "DeFi is high risk, we only list and not suggest people to buy it"