It would be interesting to see this test repeated with the same varieties, but grown in a different region. Terroir could have as much effect on flavor as variety selection.
There seems to be some overlap with the following podcast:
Episode 004 | Malt Metabolomics w/ Harmonie Bettenhausen Joining Cade this week in The Brü Lab is research assistant and Ph.D. candidate in the Heuberger Lab at Colorado State University, Harmonie Bettenhausen, to discuss her work on the fascinating subject of malt metabolomics.