How is WELS different from other Lutheran Synods such as the MO-Synod and ELCA in doctrine (e.g. virgin birth, resurrection, baptism, marriage, errors in the Scripture, the Lord's Supper, Second Coming) and in practice (communion, pulpit fellowship, women pastors, congregational leadership, gay pastors, Boy Scouts, lodge membership)? Is there an available source where notable differences among these three Lutheran church bodies are addressed?
A good resource I can recommend to you is a publication by Northwestern Publishing House (NPH): WELS and Other Lutherans. The book should answer the questions you have. Another good resource from NPH is What’s Going on Among the Lutherans? Finally, the online Essay File of Wisconsin Lutheran Seminary has numerous papers that can address your questions. Searching the subject of Lutheranism can get you started. God bless your reading and study.