JSP is more like a library or framework than a language, though I guess it's harder to make that distinction in PHP which is kind of both. But this diagram won't separate JSP from other Java (which you'll see is used quite a lot - some of that will be JSP).

"better" is subjective. While there are good things about the Java/JSP stack, its templating language is IMO cumbersome and unsafe, and its test-edit cycle can be quite long.