Bordeaux St Estephe
Due to its massive size, it’s easy to find a diverse array of wines from growers in the St. Estephe region. The top two producers, Cos d’Estournel can produce the ripest, most exotic style of wine in the appellation. Montrose, is more structured, powerful and perhaps longer lived. In vintages where the grapes are capable of ripening, the wines from those two chateaux, as well as at the other top estates are never harsh. However, in lesser vintages, or from numerous smaller estates, the wines can be some of the most rustic, austere wines in the Left Bank. When mature, the wines of St. Estephe deliver rich, concentrated wines with notes of cassis, fresh blackberry, tobacco, cigar box, stone and Asian spice.
St. Estephe not only borders Pauillac, but some of the vineyards abut Chateau Lafite Rothschild from Pauillac. In fact, at one time, some of the vineyard land belonging to Chateau Lafite Rothschild were located in St. Estephe. Lafite Rothschild was forced to lobby and persuade the ruling body to change the St. Estephe boundaries, so those vines could be included in the wine of Chateau Lafite Rothschild!
Only five wines from St. Estephe were included in the original 1855 classification. Those classified vineyards make up about 20% of the entire St. Estephe appellation. That is less than every other commune in the Left Bank. In the 1855 Classification, the top two chateaux of Saint Estephe, are the same top two wines of the appellation today, Cos d’Estournel and Montrose. Interestingly, some people claim Chateau Montrose is a better expression of St. Estephe, while Chateau Cos d’Estournel is the more modern styled wine.

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With thanks to Jeff Leve from http://www.thewinecellarinsider.com, for the invaluable information