JSP vs. PHP?

I'm still into PHP like crazy... But I have been told JSP is more powerful how true is this? From what I've read so far (tutorials and all), the syntax is 100% similar to Java i.e. it is basically Java with additional library functions... Now here's the story: I am yet to use PHP with a Graphics library (The GD extensions I believe they are), so I don't know about their performace... However the last time I wrote a decently large Java Applet, the browser took annoyingly long to load the applet... If the same principle applies of having a JVM or a Java Interpreter embedded in the browser then I see no advantage to JSP apart from the point of protability... (Unless the graphic libraries that support PHP are any slower)... Could someone please comment... Spike...