Personally I don't view neutrality as such a clear cut definition. No transducer will ever be perfect so there is no such thing as ultimate neutrality, simply can't exist. Both of these headphones come closer then most and the 4070 does sacrifice a bit of bass bloom compared to the 007 but I do think it was intentional. It does give you a cleared "view" of the bass notes.
It sure must be fun to have the 4070 strapped to your head all day for work... Still the SR-X isn't exactly comfortable either...