MySQL中内连接与一般连接中的问题

功能是一样的.我习惯用第二种WHERE字句的表连接方法,感觉更好理解.
1万条记录的测试,在phpMyAdmin里观察执行时间和EXPLAIN信息,性能也差不多.
比如连接student,score,cource三个表,查询学生ID为1的信息:
/ WHERE字句 /
SELECT * FROM student, score, course
WHERE student.id = score.student_id
AND score.course_id = course.id
AND student.id = 1;

/ INNER JOIN ON /
SELECT * FROM student
INNER JOIN score
ON student.id = score.student_id
INNER JOIN course
ON score.course_id = course.id
WHERE student.id = 1;