I'm doing comparison tasting tonight:

Rittenhouse Rye is suprisingly good as a sipper. I mostly use it for Manhattans and Old Fashions but it holds its own as a sipping whisky. On the nose it is very archetypal of rye, with vanilla, anise, allspice, clove, and cinamon. It is smooth on the palate with vanilla and sweet spice telling most of the story. It fades quickly though for a quick finish. In contrast, Whistlepig has pine and spice in the nose, and is strongly aromatic. It delivers a blast of slightly sweet vanilla and spice on the palate, and hangs in there for a very long, tingly, spicy finish. I have had a couple of drams of Rendezvous Rye on prior occasions and honestly I have not done too well with it. I got very strong dill weed in the nose and it was very off putting. I think letting the glass breathe for a while before nosing and tasting is the answer. Tonight I let the Rendezvous Rye sit in the glass for almost two hours before nosing and tasting. It was much better tonight and I got dull (not boring -- opposite of sharp) dry spice and faint hints of oak on the nose. There is definitely some older whisky in this blend. On the palate it is very thick, rich, and syrupy. It develops sweet spice somewhat slowly on the palate but packs a powerful finish that lingers on for a good while.
Whistlepig is my favorite of the three. But I am feeling much better about the Rendezvous Rye than I did prior to tonight.
--Jerome