Arnold was a self made man who came from a far away shithole , Trump was the son of a millionaire.
Austria was a first world country, not a shithole, even in 1968. Trump was given a loan by his father that would be roughly tantamount to $10,000,000 today. Do you know how easy it is to blow that kind of money in a city like New York? He turned it into the wealth you see today. Actually, he lost all of it and got it back completely on his own - where was his father in 1990? Not giving him any money to start over, for one thing. Now he has golf courses, buildings, his iconic tower, a countless investments people don't know about (which is why he didn't release his taxes). Oh, and he's also President of the United States. What's Arnold done besides turn California into a liberal shithole and cheat on the wife that got him his career in film? Let's not compare apples to oranges here.
If Arnold was that smart, he wouldn't have had to do G4P, take nude photos of himself (still searchable online), sell mail order workout videos or even inject himself with steroids for over a span of 3 decades to flex his arms on stage and later play the same role in every movie he made from 1980 to 1992. He deserves credit for what he's achieved, but he's not Donald Trump by any stretch of the imagination and I doubt he'd want to be, either. Being a billionaire and head of state is enough to kill just about anyone; look how old Obama and George W Bush looked after 8 years in the oval office.