Interesting they would use a driver from a closed back, Neuman used the driver from the open backed HD560S for the NDH30, the NDH20 borrowed a modified driver (don't quote me) from the closed back HD630VB which was purposely designed for a closed enclosure.
The Amiron Home is a pretty smooth performer so no peakiness at all and I'd assume a lot less analytical than the DT1990, from what I've gathered Beyerdynamic focused on opening up the sound stage while keeping an easy listening headphone, not an easy task with controlled or smooth high frequencies. Wouldn't call it a detail oriented phone, but not really Beyerdynamic's objective as I noted, so differs from the NDH30 in that regard.