There's no definitive answer to this question since both brass and plastic sprinkler heads have their own advantages and disadvantages. However, some people believe that brass sprinkler heads are better than plastic because they're more durable and tend to last longer. Additionally, brass is a more heat-resistant material, so it can withstand higher temperatures than plastic. On the other hand, plastic sprinkler heads are often more affordable than brass ones, and they're also lighter in weight, which makes them easier to install. Additionally, plastic is less likely to corrode than brass. Ultimately, the best type of sprinkler head for your needs depends on your budget and desired features. If you're looking for a durable and long-lasting option, brass may be the better choice. However, if you're on a tight budget or you prefer a lighter weight sprinkler head, plastic may be the better option for you.