Specifically on the Kamper, I use to have a 2002 Kimberley Kamper. When I sold it in 2015, it still looked brand new. I would stay be happy with the Kamper. I took the Opportunity to upgrade direct from the factory (Before USA dealer) when the AUD to USD was at a sweet spot giving me a great deal.
I didn't camp in the winter, but did some days close to freezing and with a heater, the Kamper was more than warm, enough
The Kamper is lighter, easier to tow, easier to store and you can put stuff on the rack on top. By itself, it sets up in a couple of minutes. It is when you add the awning that you need to add time. I understand there is a quick awning that wasn't an option on mine
I hope that helps