PHP compilers - Roadsend vs phc?

[alex]

Which of these PHP compilers is better?
Roasend: http://www.roadsend.com/home/index.php?pageID=compiler
or
phc: http://www.phpcompiler.org/

Why do we even have these two competing choices, since both are free?

 

[Fudge]

Well I thought PHP was only interpreted before I read ur Q ..>.Thanks !