That news on smaller T6 dimension only mentions 140mm vs 150mm. I guess that's the height of phone but there is no mention of width. Considering it has nearly 6" screen, the width wouldn't be smaller than Note 2 I guess.
Screen and processing power of T6 will be competitive with Note 3. But I don't think it will have stylus pen, microSD, removable battery that Note 3 has. Basically it's like bigger, faster One.