Appearance: Tie, No explanation needed: Please refer to all definitions of the word "cute" in the dictionary (1-1)
Abilities: Kirby, Both are known for their abilities to reach unusually high places and vacuum-like powers, but Kirby's is incorporated into his very being and he can float (1-2)!
Actions: Tie, Both have saved the universe and rulers of their retrospective kingdoms multiple times (2-3).
Personality: Luigi, while both are overall bright and optimistic almost all the time, Luigi's complex demeanor is something to take note (3-3)
Style: Luigi, Luigi's meticulous, studious, cautious traits motivate desires for all the little details (4-3).
Motivations: Tie, Both trek through their adventures with the noble desire to help others... most of the time (5-4).
Game Quality: Luigi, Coming down to Kirby's Return to Dreamland and Luigi's Mansion 2, Luigi inches to victory with its humor and heartfelt story (6-4).
In a very close completion, Luigi shyly takes the gold! There is no silver medal however, because Kirby ate it and transformed into Soul Silver Kirby! Luigi cautiously examines him while patting him on the head graciously. Kirby, in return, gives him a big hug. Both of them spend the rest of the day together and get a plush plaque telling them they're my favorite characters of all time.