移民局发广通知有统一的格式吗？

版主，请问移民局发广通知有统一的格式吗？最近在另一些网站上看到一些申请人收到移民局的发广通知很正式，有“Your case has been forwarded to:
CONSULATE GENERAL OF THE UNITED STATES, VISA UNIT
1 SHAMIAN STREET SOUTH
GUANGZHOU 510133
PEOPLE'S REPUBLIC OF CHINA” 的字样，而我收到的却没有这些字样，是这样写的：
“Dear Sir/Madam:All documentation necessary to complete the National Visa Center's processing of your case has been received. As soon as an interview date has been scheduled, the applicant, petitioner and attorney (if applicable) will be notified. The applicant should NOT make any travel arrangements, sell property, or give up employment until the US Embassy or Consulate General has issued a visa.The US Embassy or Consulate General may require additional documentation at the time of the interview.
两者有什么不同吗？听说，有The applicant should NOT make any travel arrangements, sell property, or give up employment until the US Embassy or Consulate General has issued a visa.字样的，就是还没有真正获得发广，是这样的吗？