Before I begin, let me say that taste is subjective, and be it known that I am a big fan of Glenfarclas and their house style. I enjoy the 12, and the 15 is glorious. The 105 is good but I prefer the Abunadh. So let's give the 10 a go.
Nose: Plenty of sherry. Green grapes, plums, fresh lettuce. Christmas cake, cinnamon, cherries, vanilla extract. Marzipan. Shows it's youth but not bitey.
Palate: Very similar to the 12yo. Baked fruits, candied cherries, christmas cake, marzipan. Truckloads of marzipan. Milk chocolate. Raisins. Again, shows its youth on the palate as this does have more younger oomph than the 12 as far as light, delicate sherried whisky goes.
Finish: Shorter finish than the 12 and much shorter than the 15yo. ( I feel like i need to add a title of reverence when mentioning the 15yo. How about his grace and majesty, the Glenfarclas 15yo?) Anyway...short, drying finish with plenty of sherry, raisins, grapes and marzipan.
Overall: So call me crazy, but I enjoy this one better than the 12yo. The 12 is smoother but lacks the bite of it's younger brother. I think that little bit of bite adds a balance that is lacking in the 12yo and keeps this one from being so 1 dimensional. This is a dang fine whisky and pairs wonderfully with some cherry stollen! I'll be enjoying 'farclas all winter. Slainté!