In this third and final instalment of his report on this year's official Grosses Gewächs tasting in Wiesbaden, Michael Schmidt reports on the 2011 Silvaners and Grauburgunders he tasted, as well as the rather older Spätburgunders. See our complete guide to all our coverage of this promising vintage . SILVANER What do Silvaner from Franken and Sauvignon Blanc from the Loire have in common? In terms of flavour, not much. What they do seem to share, however, is the ability to produce two quite different styles of wine from the same grape variety. Light, fresh and aromatic on the one hand, minerally, chewy and bone...