Old Elk Straight Bourbon vs Old Elk Sour Mash

I picked up Old Elk Straight Bourbon, Grapevine Pick from my local liquor store(thanks for the recommendation Shlok, from Golden Ox Liquors!) and was saving it for a review but then my cousin came down to visit and brought with him a bottle of Old Elk Sour Mash Reserve Small Batch. So I had the brilliant idea to do a Flash Review. Just a quick sit down and taste them side by side and see which one we like better. The Sour Mash was part of their original runs back in the testing phase, they put 30 barrels aside back in 2013. Well… they have since decided to release some of their experiments and my cousin was the proud recipient of a bottle that only 60 made it into Georgia.