When you first look at cloud migration tools, DMS, SCT, Snow Family, DataSync, and MGN blur together into similar "moving tools." But the real axis dividing them isn't "what you move (DB, server, file)" but "what trips you up during the move." The enemy of database migration is downtime, the enemy of large-file migration is network bandwidth, and the enemy of server migration is state inconsistency during transit. Each tool is specialized to solve its specific constraint. The reason the SAA exam endlessly varies migration questions is that the ability to read the scenario's "constraint keyword" and pick the right tool is precisely an architect's judgment.