These two decks share much less than the other two couples, but there is a theme that threads between the two decks
People see a card that costs six mana and think that it having a 3/4 body makes it somehow not good enough
This allows you to rapidly find your game-winning combos, such as the Worldgorger Dragon reanimation loop and Glint-Horn Buccaneer for discard damage
Solemnity prevents counters of any kind from being out on your creatures, as well as artifacts, enchantments, and lands
Gavin and I played a game of Booster Sleuth on Good Morning Magic : Remember, you just need to say the facts (for example, two words in the name, red, 3 CMC, instant, etc.) and not the exact card name