I found a PDF earlier today.. ill take some screenshots and post them.. one sec.
As for the grading, im not sure what criteria they used to base their analysis' on. Premise? Execution? Uniqueness? Not sure there are alot of variables and im not really taking any of it with a grain of salt..
EDIT:
https://imgur.com/gallery/H8KKXHonestly all of the B's are my top coins. They are OS's not Dapps. I'm all in on EOS right now, and if I was spread out I would be in ETH (most usable of the old guard) and NEO, XLM, ADA (fast new blood). The only one missing is QTUM. For what its worth Ive been mining in this game since BTC was $1...but what do I know. YMMV
And to the OP - Both EOS and ADA are blockchains. ADA is a 3rd gen platform and EOS is building a lightning fast 100k transactions per 500ms blockchain (though currently in ICO you are issued ERC20 place holder tokens, but they are tied to your EOS wallet and recorded equally on genesis block June 1-3rd).
Steemit is the only one I would say might not fit the B rating...then again its part of the block.one/Dan Larimer stew (EOS)