Short comparison. Current version (WID: 301) and an old version from the 1980s (WID: 15007)
The current version is slightly fresher and more sparkling in the nose. The older version is more set and has more depth. This is probably also something of the "Old Bottle Flavor". Also interesting is the wax note from the old version. There is no trace of this in the current version.
The impression of the nose continues in the mouth. I'll just say it like this. The current version is a little louder and cheekier and the old version is quieter and more confident. But the old bottling would probably have done a few percent more well.
Overall, I like the older version better.
But the current Dalwhinnie is a solid standard.