OLD wins all four dimensions but this really depends on your taste preference. I can easily imagine that many people might prefer the more powerful (dirty) NEW over the smoother (subtle) OLD. The FoSM club voting won OLD by 14 votes versus 5 for NEW (and 1 draw). This blind tasting showed two completely different drams that have not much in common. Both are very nice and it depends on your preferred flavours profile which one to choose. Good work done at Bunnahabhain now and back then...
NEW is one shade darker at amontillad than OLD at amber. The texture of OLD shows early fat legs and sticky tears. NEW is about the same. Their noses offer old style sherry versus new style sherry - they are completely different. OLD offers an adorable old school nose that is fresh, citric with hints of peat smoke and melissa. Very complex and all nicely balanced. NEW's nose is bolder on a rather dirty sherry profile (lubrication oil) with slight sulphury notes. My preference at this dimension is OLD (what else?).
NEW offers a peppery earthy and herbal flavours profile with dried fruits and significant wooden notes (a bitterness that is bearable). OLD is more complex and subtle on mirabelle and citric fruits within a perfect wooden structure. OLD is still fresh on the palate. Another round goes to OLD...
OLD arrives fat and coating on the palate but has some slight adstringent moments (cardboardy). NEW is bold and coating too but hot, peppery and slightly bitter from heavy tannins. I like OLD better. OLD has a long and spicy finish that dries out a little bit at the end. NEW's finish is even longer on strong herbal and spicy flavours. It dries out at the end too (tannins).