When you see 300:100 and 200:100, that is some brand's way of telling you which gear set has more torque. So instead of saying these gears are torque up, high torque and infinite torque, they given you a ratio number. But this isn't what the actual ratio of the gears. Here's a guide that I made to help me figure out the ratio of my gear set. It is very tedious to do, and if not done correctly, you'll get a weird ratio.
