I don't know about real earnings of other coins but I'm mining ZEN, at 14200 hashrate I was earning in Oct. 2017, 3 to 3.25 ZEN/day but earnings been going down to around 2.3 ZEN/day since 1/26/18.

Difficulty has been going up for sure so now I have to decide if I should keep mining ZEN and hope for the price to offset the rise in difficulty or just mine another coin... shoulda mine ZCL =.( but oh well, I can't predict these things.