The HE 400SE I could not use without EQ, the JT7 is one of the very few ones that I can use without any EQ.
That doesn't mean you may like/prefer it though or would want to EQ it.
Didn't like the 400SE headband either as it pushed on the sides of my head.
That headband really needs a comfort strap.
Looks, comfort, cable and fit of the JT7 are much better than HE400SE.