You have some good questions but no on all of them:

1. EOS doesn't even exist until next year; after Jan 2018, then multiple block chains could use the EOS software, and they could be called may different names; EOS may not even be the name of the coin that wins out.
2. Ethereum can't handle thousands of transactions a second, but it is constantly being updated by hundreds of programmers; by Jan 18th, it may be able to. Plus, Ethereum may just adopt any EOS techniques, assuming those are real and actually work. Same things goes for Bitcoin, with hundreds of core developers
3. I don't think EOS Ethereum ERC20 subtokens are worth anything, except to the people at block.one that got the ETH; it looks like quite a list of people at block.one but there are no bios on anyone on the page, it could just be a made up list of people with Dan Larimer at the top middle; either way, if you read the disclaimer and the faq, they certainly don't stand behind this work, whoever is doing it, as they have said directly it is worth nothing, it represents nothing, and there is no guarantee of anything... for something that is so incredible, why are they so unwilling to back it up... I mean they could at least say they guarantee 1% of it to be accurate, and they guarantee 1% of your EOS ERC20 subtokens will transfer to actual EOS platform tokens... they don't even guarantee 1%! I think it is great, I think people need to grow up and learn to read things, not have gangs of criminals (governments) "protecting" them. And if it turns out they keep their word, that will be great too... just not sure why they don't even guarantee 1%... plus who are all these people... did Dan meet them at a party? Why doesn't he introduce them? Why is Dan wearing such a cheap wrinkled shirt and looking all bedraggled? Do they have him trapped somewhere in the Cayman Islands, forcing him to forge white-papers that they can't guarantee?