I am biased, but to set the facts straight, you don't need any special tools to rebuild the portal axles other than a decent socket set and a copper hammer. I've done two sets, takes about two-three hours per wheel now.I’ve worked on both. Comes down to pedigree.
MB is a truck used to transport goods. To which you can get 4x4 added. Still mostly a transport chassis. MB makes a great truck. Older 90s were very easy to work on. Interesting fact, many TATA truck parts fit on MB in that era.
Unimog started as a coil sprung tractor, designed as a base to add all kinds of implements. Fire equipment, snow plows, farming. Still a tractor, very hard to justify the extra costs to maintain a unimog.
Unimogs Achilles heal, nobody knows how to set up and repair portal axles. You need special tools and knowledge
Unimogs are unbelievably awesome in the bush!
Don’t let cool factor cloud judgement.