I'm hearing the ASG1 the same way, no matter what tips I've tried.
The GR07. Definitely.
The detail is great over the ASG1 but the soundspace it creates is very artificial, very hollow, like listening to monitor speakers in an empty brand new square apartment space. This feeling comes and go with different recordings and different tracks. I'm pretty sure I'm not comfortable with it.
The GR07 has forward mids that pushes vocals closer towards you in the headstage it makes. The ASG1 has forward mids that pushes the vocals closer, but somehow slightly backwards in the headstage. As in, GR07 vocals seem to image somewhere between your eyes while the ASG1 vocals image behind your years or sometimes even behind my neck wtf.
The ASG1 is slightly more dry and aggressive. GR07 is smoother, creamier.
We will see how much this burn in thing does to it. But so far, its not been too exciting.
I have the GR07 and I agree with wilzc. My GR07 is burned in and my ASG1 is in the process.