I know there is also Wu-Long tea for weight loss, I jut want to know which tea is better: Wu-Yi or Wu-Long. I just need to loose 15 pounds.

I live in Taiwan and can tell you these teas are most likely EXACTLY the same. They are laxatives, nothing more, whatever claims they make in America. In Chinese countries these teas are very popular and normal everyday things for woman, but they are honest about the way they work! They will speed up your bowel movements so food does not sit in the stomach and intestine for as long and therefore it is eliminated before all the calories and nutrients can be absorbed by the body. Notice I said "nutrients"? Taking these teas would be the same as taking a laxative. They are not exactly "healthy" because all they do is make you defecate at an abnormal pace after eating.
But if you want to try it, use the cheaper one. They are all THE SAME, no matter what claims they are making ( and the wu-long tea doesn't even exist for real! it is a bunch of fiberous plant material that promotes bowel movements, but there is no tea leaf called wu-long that I can find and I have asked many of my Chinese adult students and friends!! The closest name is "oo-long" but this is NOT a diet tea!!
I have used these teas (living in Taiwan they are easily accessible) and I find that your body adjusts very quickly and you have to use them more and more often to get them to work and having a natural bowel movement can become almost impossible after long term use of laxatives, so don't plan on using it for more than a month!!

yeah goggle it i have read that it will make you go to bathroom a lot lol

You'd be better off drinking green tea... it speeds up your metabolism a bit and it has a lot of health benefits. :)

Yes. It does nothing for permant weight loss. It is a dehydrant and will clean out your system. Be careful while taking it. Drink plenty of water. If you need to lost 15 pounds. Excersize and eat healthy. Miracle cures only get rid of water weight and garbage in your system.

Yeaa! im taking it right now, im taking the Wu-Long tea and tastes pretty good but a bit strong