First of all, it's great SMOS Linux 2.0 is absolutely free with no fee from developer, miner program fees may apply.

Have used nvOC and SimpleMining before and I've just moved my rigs from SimpleMining to SMOS Linux 2.0 for a test.
- 30x gtx 1060 turbo 3GB
- 3x gtx 1070 8GB
- 24x rx 570 8GB

As it's still early 2.0 version there were a couple of small bugs which developer fixed really fast, in matter of hours from time of reporting.

Mining works very good on all GPUs, no crashes at all for now. We had issues with one 1070 GPU crashing every couple of hours on SimpleMining, hasn't happen on SMOS Linux yet.

Also we have been getting bigger hashrate for about 3-5% with lower settings on SMOS Linux 2.0 although with a different miner called DSTM.

SimpleMIning (old)
1060 gtx 3gb turbo
clock 75
mem 150
power limit 110
fan speed 72
265-267 SOL/s on equihash

https://i.imgur.com/MMUHmTa.png
https://i.imgur.com/qHzicl7.png

-----------------------

SMOS Linux 2.0
1060 gtx 3gb turbo
clock 75
mem 150
power limit 90
fan speed 72
278-285 SOL/s on equihash

https://i.imgur.com/Y8VEUUF.png
https://i.imgur.com/I8Ztne6.png

Haven't tested ETH mining for now, but will write back with results. For now it looks good. DSTM miner is used on SMOS Linux 2.0 for equihash and it seems it has a no dev fee where ewbf-0.3.4b which is used on SimpleMining has been taking up to 10% of total shares as some users report.

https://cdn-enterprise.discourse.org/zcash/uploads/default/optimized/2X/a/af6d7245d3396440c3bcd2a381b4da33f7ce3b9f_1_690x431.png
Source: https://forum.z.cash/t/ewbf-dev-fee-almost-doubled-1-9-to-3-6-average/22460

I'll report more things as the mining goes.

Keep up the good work.

Edit:
https://i.imgur.com/DErwp6B.png