I'd have to guess my ol' Ragen is built much better than most TTs with heavier frame & axles, 16" E-rated tires, and shocks. It's "stick 'n tin" construction, but after 7 years and tens of thousands of miles . . . zero issues with the coachwork. With additional amenities like built-in gen, bigger tanks, and cargo carrying capacity, there's no comparison.
Love the Onan 5500 in my Rage'n. I use the Genturi religiously and only ONE time had a problem with CO detector going off. That was the ONE time I was too anxious and removed the Genturi the night before we were leaving. It was a dead calm night and fumes drifted in somewhere, even though the trailer was closed up tight. Thankfully the CO detector woke us up about 2am and saved our lives. ALWAYS be sure that detector is working.