Fiberglass is less expensive and more flexible than aluminum. It does not require pre-bending or any special attachments. It also provides a better packing size when folded. Its major drawbacks are that it is affected by weather and can break into splinters and must be replaced. Aluminum is more likely to bend and can be splinted when it breaks.
Durability is one of aluminum's main advantages along with the fact that it is easily replaced.
Camping Tip Never shake out your shock-corded poles to snap them together. The violent action causes nicks to form at the joints that will tear your tent pole sleeves. Although any tent may be adequate for your needs, you may want to consider how long you would like your tent to last. Good workmanship means you can have a long-lasting relationship with your tent. On uncoated nylon tents, check for taped seams.