This document is a technical report that compares the New Mexico Multi-State Standards Assessment (NM-MSSA) and the interim Multi-State Standards Assessment (iMSSA) for English Language Arts and Mathematics. It outlines the standards assessed in both tests, noting that while the same standards are tested, not every individual standard is assessed each year due to constraints in test form construction. The report details the item types and the number of items included in each test, distinguishing between operational items that contribute to student scores and field test items that do not. Additionally, it presents the distribution of content on the tests, providing a breakdown of the percentage of operational points allocated to various content categories for different grade levels. The document serves as a comprehensive guide for understanding the similarities and differences between the two assessment formats.