Hey you do get skills here! ;-)
It's just that I have seen so many people shouting at other ones when they did not speak english but still I get the feeling...
Anyway I did not tweak core (100% in both case), I think it's due to activity handling from miner, as you can see on my snapshot, Hsrminer is less steady than ccminer, certianly it makes drop on core speed.
I also mine ZEN, on another rig... here it's for GBX, imagining that it might pump someday, Nvidia is better actually on Neoscrypt than Equihash.
I think most of the shouting at damn foreigners is for the Russians that write in Cyrillic!
I am still puzzled by how well hsrminer works for you and how poorly it works for me. First you get 1.38 MH/s while I only got 1.23 MH/s - that's 12% more already - and then my actual earnings at the pool were only 76.3% of what I should have made based on average difficulty for the time period.
My test with ccminer-klaust has only been running for 1.75 hours but earnings are pretty much exactly as predicted by whattomine so far.