区别就是两者用法是不一样的，具体的不同如下
much so中文意思是如此
He himself believed in freedom， so much so that he would rather die than live without it.他本人如此信奉自由，以至于宁死也不愿没有自由地活着。
many so中文意思是许多如此
We did have a limit of 5，000 words but some people thought that was too many so this year we've reduced it.
