2015.18 Hardest/Harder - Solution
2015.18 Easier/Easiest - Solution
B2 was the seed entry - been on the list of possible seeds for a while, and I happened upon a nice clue for it recently, so that explains its usage in the entry. I was surprised to find just how popular B2 is - this infographic shows that it's first or tied for first for the most popular liquor in fifteen states across the US. Also surprised to see it was first produced in 1984 - I hadn't ever heard of it until about five years ago, and its popularity has apparently skyrocketed since then, so hopefully it wasn't too much of a toughie for you (though I think the lack of the E in the second word may have caused some struggles).