How Do We Judge Ratios?
To assign ratios, one must know what each ratio mean.
50:50 - Neutral/Even. Both characters have an equal amount of advantages and disadvantages against each other. The degrees of punishment and tactical efficiency are accurately similar on both sides.
60:40 - Advantage/Disadvantage. One character has something over the other character that puts him/her in a bad position, be it long range, fast speed, high juggle ability, etc. While the lesser character can get around it, it'll often be a nuisance to get around.
70:30 - Heavy Advantage/Disadvantage. The winning character capitalizes on the losing character quite hard. Usually in these cases, it's the winning character has a strength, that directly goes against the character's weakness. For instance X Character is fast and has long range, while Y character is slow and has short range.
80:20 - Extreme Advantage/Disadvantage. Winning Character has something so huge over the losing character that it over-centralizes the match-up(DDD vs DK comes to mind). This starts to enter the realm of unwinnable, though not quite there.
I won't go any higher/lower than that. I also didn't do anything in-between because it's far too specific to go into, though that doesn't mean the ratios can't be used. It mainly pertains to varying degrees when looking at advantages/disadvantages.
When that understood, the rest is easy(not really). Compare and Contrast all advantages and disadvantages of each character, and see which character has the better advantage.
TL;DR: 60/40 is adv. not a counter.
