Some comparisons:
View attachment 710420
It is a bit of an apples to oranges comparison. The CORE is the same chassis design as used in the EarthCruiser EXP/FX platform. It is very well suited to a composite habitat of around 14 feet. CORE sells a spring mounted subframe specifically designed for a 14' Total Composites box. The transfer case, axles, and wheels are pretty standard 4x4 stuff with widely available parts and could be serviced by most mechanics. The Acela Straya is a Class 5 truck with much higher payload capacity, more wheelbase options, and a military axle/wheel configuration with CTIS.
A full buildout out on either of these trucks is going to put you in a $250K+ vehicle. I think you really have to ask yourself how much technical terrain you really want to tackle in a $250K truck, and will the truck even fit where you want to go? Also, how much highway driving will you need to do to get to your desired destination? I suspect spending days on the highway in an underpowered cabover truck with 41" mud terrains is not a pleasant experience. The awesomeness of CTIS and the off-road capability in the Acela is undeniable, however.
I was about to pull the trigger on a CORE chassis last year, but backed down. I love the concept of the cab-over as it allows for the maximum habitat length with minimal vehicle length, but ultimately you are paying $150K for a Frankenstein work truck. There will be engineering integration issues, there will be warranty disputes, and there will be repair issues. If you are willing to add another 4 feet to your vehicle, you can get a highly capable domestic heavy duty pickup chassis with tons of options, creature comforts, OEM integration, and warranty support for half the cost. They are not nearly as cool, however.