One thing is for sure, there is no one perfect EV to satisfy the way everyone wants to use them and when you find the perfect one for you there are still going to be trade offs. I think it helps to identify the features that makes one platform unique and determine if those characteristics will enhance your travels and still be very comfortable at your destination. With the Patagonia, you'll have a highly capable off road chassis, thicker insulation, higher end windows and more customization possibilities. In some more extreme sustained travel situations these characteristics may be important and worth the added costs.
With the EC, it's off road capable AND has international city friendly features, meaning with its short wheel base (134in) and overall length (~21 feet) it maneuvers tight streets better than most pickup trucks with its tight turning radius and still fits in a traditional parking spot. At least with the EC EXP (popup) you can fit it in a shipping container, navigate under branches, rock overhangs (WRT), low bridges and even drive throughs. With the EC FX, there are a few more height limitations. These characteristics translate to tight switchbacks and offroad maneuverability when on the trail. The tradeoffs for these characteristics are largely interior storage, tank sizes, and bed configurations. EC has moved from a diesel to gas platform in which one benefit is no DEF to worry about during international travel. With Fuso withdrawing from the NA market, EC has a few other similar platforms in which they'll be able to adapt. I doubt there will be any real issues for parts and service of a Fuso based EV even after 2028, when they'll be officially out of the NA market. They still be produced internationally and there are many 3rd party parts distribution channels.