I'd say to my ears, the difference is one of frequency response. My AN16 is quite mid-centric and on the bassy side. The GR07 has a brighter treble, perhaps by as much as 4-5dB or such. AN16 also seems to roll off the treble at the upper end more, leading to a slightly more muffled, wooly sound in comparison. As for imaging and texture, the AN16 sounds very much like the GR07 classic to me.