Brawl is a lot more balanced with MK banned. with MK legal melee has better balance in the top tiers. Low tiers in brawl stand a much better chance usually.
Well Melee, they have Armada's Young Link (E Tier) beating the third best character in the game called Puff (S Tier) at 2 National Tournaments. Melee even had a Mewtwo (7th Worst Character) at a Winners Finals against a Peach (6th Best Character), even though Mewtwo lost, it was a pretty close game. Melee also has AXE with his Pikachu (D Tier) and he's been doing very well against ppl (Even the best character in the game). Also, Melee had scorpion master (Mango
) who beat like the S and A tier characters with a D Tier character.
Melee even had major changes to it's tier list like Puff who was originally a mid tier going to high tier and then going to being the third best character in the game. Also, Marth being like one of the best to like not even being in the best tier anymore (Went down from 2nd best to 5th best).
At this point, it looks like Melee is a much more balanced and less tier related game. (Unless if you Brawl guys wanna point something out to continue the debate)
In Melee's Favor of being less Tier important:
1. Melee never needed to ban a character to get diversity (Unlike Brawl where we needed to ban mk).
2. A Young Link secondary (Armada) has been recently winning against nationals against a Puff player (Hungry Box).
3. A Peach (Who is not in S Tier) won Genesis 2 (National) against a Fox (Who's the best character in the game).
4. A Mewtwo (7th Worst Character) in winners finals.
5. A Mario that placed high in tournaments.
6. Big Tier list changes like Puff going from mid tier to high tier to becoming the 3rd best in Melee, Marth dropping from 2nd best and best tier to 5th and 2nd best tier, Best character changing from Sheik to Fox.
7. Axe (D Tier character) doing pretty well.
In Brawl's favor of being less Tier important:
1. A Ganon (Worst character) won a MK banned tournament (The fact that it's mk banned will probably weaken the favor).
2. Mekos (Best low tier character) doing pretty well.