I was invited by 'Squire' to post my results after tasting these two drams side-by-side. I stated my guess (untested as yet at the time) that Old Weller Antique 107 and Old Rip Van Winkle 107 might be essentially the same juice in different bottles, in the thread about what you've bought in Fall, '13. Well, here's my findings:
While I can't say unequivocally that they are the same stuff, I will say, after tasting the two side by side, that they are exceedingly similar. Granted, my palate is not as well-trained or discriminating as many of you folks, so please take this evaluation as just one man's opinion. The extra 3 or 4 years of aging didn't (IMHO) change the ORVW (10-years old by the label) very much compared to the OWA. Both were very aromatic, and sweet on the nose, as I find many wheaters to be. I did pick up a slight note of barrel char from the Old Rip that I didn't get from the OWA, and I picked up a very slight maple hint from the OWA, not noted in the Old Rip. The color, and the legs of each were identical (rich copper/amber with red highlights, medium-long and thin legs). The mouthfeel of each was a bit thin, but decent; very nearly identical with a smidgen of an edge to the Old Rip. I also found the OWA just a tad hotter to the tongue, but in only a very miniscule way. The balance of vanilla, toasted oak and slight brown sugar flavors was a little better in the Old Rip, which gave it a very slightly mellower quality. The finish of each was quite similar; both being about medium-to-long, and warm; with fading sweetness. I found both to have a slightly astringent quality in the mouth. Not uncommon in wheaters, in my experience. Soooooo, there you have it! I don't know that I'll purchase any more Old Rip (for almost $20 more), just to get the very minor differences that I detected. I don't KNOW that the mashbills are identical; but these two individual bottles certainly suggest they might be.