in summary the only reason why Ethereum is bigger is that they have a lot of money to manipulate the market with the in exchange manipulation of price and in social media spaming to advertise it as a good platform but in reality anything else is better than Ethereum and does the same thing better.
i haven't checked out Ark much but i know Lisk does it better at least.
it's true. etherium is heavy manipulating by the banks and poloniex.