Just realized I had mislabeled a sample. I was actually drinking the Hongyin A, not the Hongyin Iron in the above post.Inspired by shah8. 2014 XZH Hongyin Iron Cake.
First few steeps were shorter. Emphasized the floral, ethereal character. Then with longer steeps the liquor turned quite dark. A very high quality tea. A comparison with 2004 YQH Dingji came to mind in that the XZH is a much better tea in terms of its refinement. Like a BMW compared to an Acura. My sense, though I'm a novice compared to shah8 on this stuff, is that the quality of leaf, location, etc. was very particular and high level on the XZH. Whereas with the YQH being a blend with less known about the particulars of the origin, it's just not as high quality in material selection.
The two areas where the XZH was lacking was a) didn't last more than ten steeps b) the depth of the energy wasn't an immersive oneness, but still, was a nice present emptiness energy. The Dingji didn't necessarily have more energy, and I don't find it to be the most energetic of YQH, but I'm guessing the overall age of the trees was older.
Overall the XZH was a very refined tea and well in the direction that teas are ideally realizing.