Ratings and rankings are both ways to indicate someone or something’s relative standing. However, ratings seek to gauge the value within a finite spectrum, in the case of MMA Ratings, the five star system. Meanwhile rankings seek to determine the value within a sequential order.
MMA Ratings uses fight and event ratings, to ultimately determine fight and event rankings.
Meanwhile, every site seems to have their own fighter rankings, and every fan seems to want to publicize their own rankings. The result is that the multitude of fighter rankings are so speculative and diluted that they lose their value. Bloody Elbow seeks to create meta-rankings, which combine the results of major fighter ranking providers. MMA Playground‘s fighter rankings are based off of the community’s fighter rankings via their My Fighter Rankings page.