What matters is IMHO is how many people are going to be using those two platforms. I feel Yours will have a big advantage in that department versus Steemit, Synereo and Akasha (which I believe will have the 2nd biggest supportive community/developers behind Yours). Whether or not they do anything better than Steemit is a moot point. They don't have to.
Yours will likely be that choice because there are more people to recommend Yours in the Bitcoin community to their non-crypto friends and it cuts out the middleman when getting into crypto.
If you are projecting success based on the size of the cyrptocurrency community (and one degree of relations from them) that can be brought into a social network, then you are focused on failure.
Success is bringing in millions of users from outside of crypto-currency due to viral spread. Meaning that people outside of crypto should be bringing in people from outside of crypto. For that we need the correct design.