Actually, I am a salesperson for a company that sells both the iTech brand and the T3 brand to hair salons. So I am not going to comment on either.
I will say though that the two brands are made by totally different companies. So your information isn't correct. iTech is imported by HairArt, which imports a whole bunch of stuff, including mannequin heads, hair rollers, aprons. T3 is made by T3 Micro, which only makes these tools.
And I also want to say that T3 has a really good reputation and is considered very innovative. iTech is probably more affordable and is probably trying to offer a similar product for a lower price.

I just tried the iTech ceramic ionic tourmaline flat iron. I love it. It equals the T3 Tourmaline flat irons. Both of these are made from the same company called Hairart. I have a Hai iron which is great but when I purchased this one I liked it even better that my Hai. Which says a lot. It is GREAT. My hair is so straight and shiny with this. It is my Holy Grail iron. And the color of this iron is different. It is red and white. And the controls on it are digital. I highly recommend this product. I got it on Ebay for a pretty good price. On their website they are $150.00. But on ebay I got it for about $120.00.