Swim training gear and rowing machines both can support athletic training, but they do not train the same setting or movement. Swim training gear is used in the water to adjust stroke practice, body position, kick, pull, breathing, or resistance. A rowing machine is a dry-land cardio and power tool built around a seated rowing motion.
The difference matters because swim training gear changes a swim drill, while a rowing machine creates a separate workout. Rowing can support conditioning, but it cannot replace the water-specific feedback that swim tools are designed to create.