What is deference between Hamilton and musical theater singing?

Sung through musicals have some spoken dialogue, but it's usually still included within the songs, so people kind of miss it. Laurens sings as Eliza and Hamilton have a spoken dialogue where she reads a letter revealing Laurens' death. The differences in these two genres are vast. The main one is that in a traditional art of opera, singers are not amplified. Opera singers train for years to be able to produce such powerful sounds that the audience in a big theater like the Metropolitan Opera can hear them. This in itself is incredible!

In hamilton all they do is sing there is no script in other theater things most have a script