I've always heard that Tea Tree Oil is antiseptic, but throwing in the antibacterial, anti-fungal, and antimicrobial just sounds better. You also said that it moisturizes... just this 3n1? a couple months ago i purchased the regular 3n1 and found my skin, hair, and scalp to all be very dry. Although, I am a stylist and should be using separate shampoo, conditioner, body wash, but it was the spotlight product and i hadn't ever used it.
New terminology is always great, isn't it! Both 3-in-1's clean and condition the hair and skin. For some, this conditioning may not be as moisturizing as they need or like. I think if you found the regular 3-in-1 to not provide enough moisture, most likely the Tea Tree version would not as well, as Tea Tree oil on it's own tends to be a little drying.