最佳答案
区别就是两者意思是一样的，但skilled为非谓语动词形式表形容词性而skillful为形容词后缀ful。
skilled中文意思是adj. 熟练的，有技能的；技术性的，需要熟练技术的
skillful中文意思是adj. 熟练的；巧妙的
Business people who have hired or worked with MBAs say those with the degrees often know how to analyze systems but are not so skillful at motivating people.