Glenlivet and Aberlour are the same company (along with Scapa, Ballantines, a whole mess of other scotches, Pernod, Ricard, Seagrams, Jim Beam, and Wild Turkey).
Different distilleries though.
I'm currently working on a 14-year cask strength Glenlivet bottle I picked up at the Aberlour distillery in December. I was too cheap for the single-cask Aberlour.
1955 maker's should be fun, but once it's sealed in the bottle, it doesn't age. You need the oak barrels for that.