+Unruly Catapult -Lobber Crew: Almost the same card, but easier to untap.
+Quick Study -Winged Words: basically a better card due to being an Instant, although we lose the Flying-matters.
+Grabby Giant -Zealot: 5 mana to deal 2 damage is a lot to ask for. Grabby has early game utility and late game card draw, which is something Red needs.