is qtum more scalable then EOS or ETH? or what benefits QTUM network have?
Right now, EOS is the most scalable because it has just 21 nodes, but is highly centralized. Qtum is like Ethereum and has problems scaling, but that may be resolved in the future (though Ethereum has the edge because of all the developers working on it). One benefit Qtum may have is its upcoming x86 VM, allowing smart contracts to be programmed in numerous existing programming languages, but Ethereum is also working on that.
Another advantage was meant to be its Simplified Payment Verification (SPV) protocol - used by Bitcoin - that makes it easy to run dapps on smartphones (because you don't have to download the entire blockchain to verify transactions), but, apparently, that's not the advantage it once was.