"different performances" is correct and usable in written English.
For example, you could use the sentence: "We enjoyed the different performances at the music festival."
"Two same results, they scored in injury time again, but two completely different performances," he said.
The different performances of Chamberlain and Halladay suggested the difference between the Yankees' and the Blue Jays' pitching staffs.
Without new motivations for listening and performing, the point comes when we're just hearing different performances of the same thing.
For similar reasons, and because of differences in noise levels (of the smoothed data), we observe different performances across sources.
Tonight they have both come out with very different performances.
Different viewing strategies also led to different performances.
Different performances on fall classification would most likely be caused by different flexibilities of classification models.
And, through the ebb and flow of each day, you get different performances out of yourself.
"At Wesleyan, there are students who sought us out at different festivals, different performances.
What is fascinating is how each version yields totally different performances.
Topalov's recent double round tournaments, however, have featured very different performances in the two halves.
