In terms of overall performance, Copper and Galvanized Steel function with similar effectiveness if they are installed, tested, and maintained correctly.
If you’re looking for a solution that is more affordable but will still function reliably, you may want to choose galvanized steel. However, you’ll have to monitor it much more closely and pay for repairs more frequently.
If you’d prefer to pay a bit more to avoid the hassles of additional repairs, copper is the right choice.