I had 3250, 54, this one and 444 open successively with quite a bit of overlap and although I really liked each and every one I'd say qualitywise they're 54 > 3273 > 444 > 3250.
Freshly opened bag of raisins, Curiously cognac-y. Coffee with cream? Or sour cream, or warm milk? Spicy and slightly greasy as Glendronach usually is. Red dessert wine.
Red apples, leather, a very good and not overly px body. Medium sweet instead of the resinous and syrupier 3547. The wood here is curious. Sort of tannic but very velvety. It doesn't dig violently into the gums, just sort of hangs around. More like sherry and oak separately rather than the furniture aromas in Glenfarclas. Fresh plums.
A delightfully persistent prune marmalade & wood cocktail that finishes with something faintly herbal like a fresh mint leaf. If you've tried one of these 90pts-ish px single casks you know what to expect.