What's difference between the Sizzler and the Sunburn

The sizzler anti-ship missile sounds like a Sunburn.
how come never mention in this forum? The missile already being deployed by the chinese according to the article.

http://news.yahoo.com/s/bloomberg/20...g/ako7y_orw538

Tony Capaccio
Fri Mar 23, 12:18 AM ET



March 23 (Bloomberg) -- The U.S. Navy, after nearly six years of warnings from Pentagon testers, still lacks a plan for defending aircraft carriers against a supersonic Russian-built missile, according to current and former officials and Defense Department documents.

The missile, known in the West as the ``Sizzler,'' has been deployed by China and may be purchased by Iran. Deputy Secretary of Defense Gordon England has given the Navy until April 29 to explain how it will counter the missile, according to a Pentagon budget document.

The Defense Department's weapons-testing office judges the threat so serious that its director, Charles McQueary, warned the Pentagon's chief weapons-buyer in a memo that he would move to stall production of multibillion-dollar ship and missile programs until the issue was addressed.