What's the difference between a random-orbit sander and a 1/4-sheet finishing sander?

Random-orbit sanders (like the DeWalt DWE6423 and Bosch ROS20VSC) spin a round hook-and-loop disc with a randomized pattern that removes material faster and leaves fewer swirl marks. Quarter-sheet finishing sanders (like the Bosch GSS20-40 and DeWalt DWE6411) use cut sandpaper and a straight-line orbit that excels at fine, flat finishing and getting into corners, but removes material more slowly.