"many too"并不是一个正确的英语表达，你想问的或许是"too many”和“much too”。

区别

1、修饰对象不同

too many：修饰复数可数名词，There are too many books in the library.（图书馆里有很多书。）

much too：修饰形容词或副词，表示程度过高或超出正常范围，The coffee is much too hot to drink.（咖啡太烫，没法喝。）

2、语法功能不同

too many：在句子中通常作定语，用来描述名词的数量特征，即“太多的……”，Too many people have gathered here.（这里聚集了太多人。）

much too：在句子中作状语，用来修饰形容词或副词，强调程度，意思是“太……”，She drives much too fast.（她开车太快了。）

举例说明

1、too many

- There are too many cars on the road during rush hour, causing heavy traffic.（在高峰时段，路上有太多车，导致交通拥堵。）

- He has too many tasks to complete today, so he is very busy.（他今天有太多任务要完成，所以他很忙。）

2、much too

- The exam was much too difficult for the students, and many of them didn't do well.（这次考试对学生来说太难了，很多人考得不好。）

- It's much too noisy outside; I can't concentrate on my work.（外面太吵了，我无法集中精力工作。）