My first impression are,
1. very light and very good fit.
2. compared to tf10 i felt the signature of westone to be a little warm(very little). this may be because tf 10 has a bit forward highs. also tf 10 has a larger sound stage then these. 
3. mids on these just blew mind. tf 10 does not even come close.
4. low are impressive and detailed.
this review is written in literally written after 10 minutes of wearing these.these are my first impression and not a full review.