I've owned both -- a FWC and the Bundutec. The FWC had a corner damaged by a tree near the road and it was a nightmare trying to find someone who could repair the aluminum skeleton. Any damage to the wood frame in my Bundutec can be fixed much more easily.
Is wood better than aluminum or composites? Maybe, maybe not. It depends on who builds it. Maintenance on wood would be, IMHO, much easier to repair, especially in the field. Composites are definitely lighter and might be stronger but would be far more difficult to repair. Honestly, my Bundutec is a much better quality build than my FWC was.