PHP | SQL自然语言模式与两个查询

Question

我只是想知道......

这有什么区别：

SELECT * FROM table_name 
WHERE MATCH (col1,col2,col3) 
AGAINST ('keyword' IN NATURAL LANGUAGE MODE);

和此：

SELECT (...), MATCH ( description ) AGAINST ( '$searchname' ) AS relevance 
FROM places 
WHERE MATCH ( description ) AGAINST ( '$searchname' )
ORDER BY relevance DESC

两者都给我们按相关性排序的结果吗？