The spout height is how high the faucet is; the measurement from the bottom of the base to the highest point of the neck of the faucet. The spout reach is how far out the spout comes into the sink. This is measured from the center of the spout base out to the water stream. These details will come in handy especially if you are looking at single hole faucets or vessel sink faucets. You will want the spout reach to hit the bottom area of the sink…not necessarily the drain which is sometimes mistakenly assumed. This will help reduce splashing and leave ample room for hand washing.