The key differences between wrought iron and aluminum fences lie in their appearance, weight, and maintenance needs. Wrought iron fences are heavier and can be more ornate, often featuring intricate designs and decorative elements like spikes. They are extremely durable but may require occasional maintenance to prevent rust. Aluminum fences, in contrast, are lighter and often have a more modern appearance. They are resistant to rust and corrosion, making them a lower-maintenance option. Both types provide excellent security and can be used for both residential and commercial purposes.