没有区别,都是引导让步状语从句.如：
However you work hard,the boss is just not satisfied with you.
=No matter hard you work,the boss is just not satisfied with you.在句中呢据我的印象，好像这两个词都不用于句中。The workers lived a hard life in the old days, however/no matter how hard they worked.这个例子的让步状语从句是在句末。无论用于何处，主句和从句之间都要用逗号隔开。the most surprising thing about it, however,is that it can land anywhere书上的句子，该怎么改这个however是“然而”的意思，不同于上面的however。这句可以改成：However, the most surprising thing about it is that it can land anywhere.