The great advantage of Tezos over Ethereum is that the foundation is holding a lot of coins and therefore they can just spend the staked coins and never go bankrupt. They are in the league of the "dev rewards" chains. This is a big deal.
$DASH, $ZEC, $BIS and reward model blockchain projects have huge advantage over ICOs. As they add to marketing, the value of the network goes up gradually, lowering costs of any furture investments into marketing or otherwise. ICOs get a pre-entry flat rate instead.
Tezos has both the ICO and the staking rewards for the foundation, therefore the greatest advantage for long term viability of the project.