8 Gates Lee is better. Common sense. However, he is a gamble as his mystery targets 3 RANDOM enemies...so you should be aware of that. But against the regular lee, he is better IMO. Good Luck.

https://youtu.be/Dr8UpNEd3so Quick Video i made to check him out a lil bit

ohh i see your concern.. TBH there are better ninjas out there to focus on that Lee or 8 Gates Lee. For me, having 8 gates Lee is just a token or prize....something to have. However, my use of him is limited.