"The 15 Whales control 90% of the tokens on EOS. While Steem might not be great with 34 Whales having almost 53% of the SP, we are seeing the trend the other way. "

Common mistake - it's like comparing apples and bananas. Steem in practice serves just as s social/blogging platform and all those "dapps" run on it are just white noise on the chain with no real significance/utility, while EOS is a whole ecosystem and is not only limited to the core chain - so them whales have much more space to roam and are not limited to participation in mutual jerking circles ;-) On the top of that there are parallel chains based on eosio software with totally different power distribution logic - for example Telos beheaded all whales so there are no whales "by birth" on that chain...