Both resist rust are quite durable and last a long time.
Aluminum gutters vs galvanized gutters.
Galvanized gutters have an extra layer of coating that adds protection against the rainwater the weather and other physical damages.
Aluminum gutters however cannot be installed on roofs that use algae resistant shingles 3 or copper flashing 4.
It is more resistant to the elements than non galvanized metals and because it is heavier and more durable than aluminum it will last longer.
Galvanized comparing aluminium and galvanized steel rain gutters is easy but contrasting them is a nightmare.
They are often considered two sides of the same coin because they are nearly the same price.
Pros galvanized metal maintains its appearance very well for the first several years.
The copper particles which help the roof resist algae growth may cause corrosion of the aluminum when moisture is present.