Almost ALL Pnzis let people get ROI at the beginning - I hope you know that? So difference betweet Ore-mine and 12dailycoin is only time of providing and rates.
You contradict your argument in your own statement .
Any proof of legit from both services - no!
Cloudmining.website has "proof of mining".
Ore-mining supposedly "runs ad-campaigns on the website to make it sustain".
Now go disprove those claims and then come asking for "equality".
Edit: tl;dr version, 12coins is a obvious ponzi while Ore-mining and Cloudmining.website, require extra time/energy to disprove their claims. Hence the difference.