Fiberglass or alum siding? Looking at Gulfstream Kingsport

We had a '04 Kodiak with fiberglass siding that we just traded in on a '14 Jayco Swift 264 with aluminium siding. The fiberglass was great, until a crack developed in the front panel. Dealer fixed it once while it was under warranty. A couple years later the crack returned. No easy fix as it was a curved panel. It's aluminium for me now.