Turns out you have to use static difficulty with ccminer 2.0. I'm using diff 0.01 and it's reporting 65MH/s. Pool is reporting a similar hashrate.

ccminer 1.2-x15 is ~20% slower than 2.0 but works well with VARDIFF.

I can't get to 70MH/s even with GPU clock and voltages tweaking. I have a Zotac 1070 Mini.

Yeah, that's the one from: https://github.com/tpruvot/ccminer/. Shows a much lower hash rate in the dashboard.

Why? Which miner is recommended?

So which version of ccminer should be used? I'm using the one from theblocksfactory (v1.2 with myr-gr) since the dashboard shows the correct hash rate.

ccminer 2.0 reports a better hash rate than with 1.2 but the pool doesn't agree - I'm getting ~30% of what ccminer shows me.

I'm mining with a GTX1070 on Win10 64b.

Best,
mksm