SQL Server Propagation
Use Visual Studio Sql Server Data Tools. It has a schema compare tool that you can use to view differences between any two databases. I have used this tool to do things very similar to what you are asking.

Instructions for Using the Schema Compare Tool
General Instructions are


Create Database Project
Connect Databases to Project
Click "Schema Compare" in SQL Menu
Select Source and Target Database
Hit Compare Button
Select What you want to keep/get rid off
Click on Generate Script