So similiar that they can be confused between each other as this German news host found out:
http://news.yahoo.com/s/yblog_thelookout/20110512/us_yblog_thelookout/german-tv-news-host-confuses-star-trek-logo-for-navy-seal-emblem (http://news.yahoo.com/s/yblog_thelookout/20110512/us_yblog_thelookout/german-tv-news-host-confuses-star-trek-logo-for-navy-seal-emblem)
So that's how the Seals did it! They beamed in! No one ever saw it coming.