What was the main difference between the taxes in the Stamp Act and the Townshend Acts?

Not sure if this helps

The Stamp Act imposed duties on most legal documents in the colonies and on newspapers and other publications. After the Stamp Act was repealed, the Townshend Act were created and imposed import duties on tea, paper, glass, red and white lead, and painter's colors. Both provoked a major imperial crisis.

from the conditions of the working class in england by friedrich engels,the main idea is :

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.