Hello,
I love the idea for the thread... Thumbs up!

So... now to the question: I currently own a miner that is set for LTC and am expecting a delivery (yeah, Ant

) of a setup for BTC. I have no clue on what to expect of the UI (if it will be the same as the one I currently use) and where to actually set-up the machine to work. All recommendations and explanations are more than welcome...

Looking for a stable and fair pool and some guidance on configuring the S9...

Kind regards,
MassaCreto
The UI for Bitmain Antminers are all the same, so for S9 once you connect it to power supply (sold separately) and connect it to your LAN.. then go to your computer, you'll need an IP scanner software to recognize the all machines on your network (including the new S9 miner) after you know the IP of the miner you can just type it on your browser and you'll be able to configure the pool and your bitcoin address.. I found this instruction video for you:
https://www.youtube.com/watch?v=QNek1wjUIF4As for choosing the pool there is not really concrete which one is best, these are you options:
1. Rent your miner on NiceHash or MiningRigRentals for fair price and predictable payment
2. Join one of the mining pools for variable daily payments however on overage it'll be predictable
you can get a sense of your income from the following calculator:
https://www.cryptocompare.com/mining/calculator/btc?HashingPower=13&HashingUnit=TH%2Fs&PowerConsumption=1300&CostPerkWh=0.2finally mining pools are different in fees (ranges from 1% to 4%) and the payout scheme (PPS, PPLNS, ...) you need to review this information before deciding to join the mining pool: below are the list of mining pools that you use your new S9 with ... happy mining
https://blockchain.info/pools