I don't know who else knows this but after completing the MQ. Mama Murphy can give unique predictions based off of which ending you completed. (assuming she's alive, and hasn't been convinced to give up chems)

Institute: You're wearing a lab coat. You're standing with... men of science. Visionaries. Brilliant but misunderstood. I see a land marked up, like a great experiment. Each test a new beginning. Each sacrifice an acceptable loss. You will not be loved, but you will save humanity. However you choose to define it.

Minutemen: You're standing with... the people. Working together. United. I see a land filled with hope again. Fear falls away as the brave step forward to join the ranks. You're a hero. A symbol for a better world. Our world.

BoS: You're wearing a suit of steel and energy. You're standing with... your brothers. Your mission. Accomplished. I see a land secured, contained. Dangerous objects taken from those who don't understand. Those who can't be trusted. You are the uniform, and you wear it well. And your rank and chain of command protect you better than the thickest armor.

Railroad: You're wearing a mask. You're standing with... outcasts. The underdogs. The lanterns in the dark. I see a world that will never know your sacrifice. You have led the enslaved to freedom, but they must still hide from those who don't understand. But you'll be there for them. You'll see their humanity when no one else will. You'll be their guardian in the shadows.