Steem has the early player advantage and Steemit 2.0 that Dan mentioned a while ago is not going to even be the main thing on the EOS platform, there's also similar incoming platforms on EOS like ONO, but at this point in time, i believe its too early to make a call, since Steem is still in the minimal viable product phase and there's still a lot to come and the competitors are not even in the market yet.
Try posting this thread in 3 years and you may get different answers but for now, Steem on baby :-P
A quick skim of the ONO whitepaper reveals 75 initial for them, 5 per year for everyone else. Not a very good distribution, and it reeks of get-rich-quickism, plus there will be plenty of favoritism when they're choosing how to use that 75.
I'm pretty loyal to steem also.