I have both the King and Exclusive 5 by TFZ and IT03. I like the IT03 better but it is not fair comparison as the TFZs are single DD while the IT03 is a hybrid. Given the choice, I would chose the IT03 over the others. But, I do like the TFZs sound signature and for the price, they are a nice piece.
I like the IT01 so far. I'm burning it in now and like its sound. Seems a little darker than the King and Ex 5. I have always gravitated to the warmer signature so the IT01 is fitting in there nicely.
Thanks for the summary comparison. I was wondering how IT01 compared to TFZ Exclusive 5 (which I own) since both are graphene driver IEMs.