You mentined you were calcuulating what was best "I'm calculating which situation is better for us, both mining btc/ltc , or ltc only.", i did run the numbers a few days ago on the gridseed miners on the GRID project, the numbers on whats most profitable should be simular for you.
Will there be any info on the mining proces once its up? Can we check how much income the miners generate?
Not sure what degree of statistic they will provide but here's an estimate(coinwarz) for GRID based on todays btcprices and profitabillity based on the following: usd per btc 543,59(very low now would have been better to exchange yesterday at ~620 or next time up over 600 in my opinion), 160 usd/miner 164.467 inkl controller, 65 370 000 shares 7 watt scrypt only or 7+53=60w(Scrypt+SHA256), 0.09 usd/kwh, dual mining mode(scrypt+sha256) 300 kh scrypt+8gh/s btc or 350 kh/s scrypt only.
scrypt+sha256 ->inkl btc
per miner/day or in usd btc/day btc/day div per div per share exchange @ exchange @
without with with all miners share and and week 600 usd/coin 650 usd/coin
electr electr electr and day per week per week
BEST scrypt 1/228,22 btc 2,38 2,37 0,005427 1,166 btc 1,784 sat ~12sat/12% ~14sat/14% ~15sat/15%
DOGE 1/348,74 btc 1,56 1,55 0,003918 0,842 btc 1,288 sat ~9sat/9% ~10sat/10% ~11sat/11%
LTC 1/423,48 btc 1,28 1,27 0,003403 0,731 btc 1,118 sat ~8sat/8% ~9sat/9% ~9sat/9%
BTC 1/777,86 btc 0,70 0,58
scrypt only
per miner/day or in usd btc/day btc/day div per div per share exchange @ exchange @
without with with all miners share and and week 600 usd/coin 650 usd/coin
electr electr electr and day per week per week
BEST scrypt 1/207,94 btc 2,61 2,60 0,004783 1,027 btc 1,572 sat ~11sat/11% ~12sat/12% ~13sat/13%
DOGE 1/298,92 btc 1,82 1,80 0,003311 0,711 btc 1,088 sat ~8sat/8% ~8sat/8% ~9sat/9%
LTC 1/360,24 btc 1,51 1,49 0,002741 0,589 btc 0,901 sat ~6sat/6% ~7sat/7% ~8sat/8%
So in the ballpark of 8-15 satouchi per 100 sat share per week or 8-15% weekly return on investment if mining dual at the specified rates, if better firmware will be avaliable some seems to think they may produce around 500kh/s scrypt but it may be better to skip the extra 53 watts sha256 mining would add then if they will go up and run at such rates, the added heat in comparison to the return from it will hardly be worth the increase in temperature and risk for failures. Next difficultyincrease for btc looks to be around 25% so when miners arrive the btcmining(SHA256) part will be at around 0.44 usd/day at current usd/btc price.
Mining both scrypt & BTC should still be slightly more profitable unless there is a scyptcoin thats extremely profitable a single day, but the difference is probably only something like 0,2 usd per gridseed 5chip miner and day or 10% with current difficulty on btc and the power usage reported seems to be 7 w scrypt only and 60 w scrypt+BTC(sha256) so maby the temperature increase may be a factor to if it's hard to get the miners stabalized.
On the next difficulty change in around 11 days the difference may be dovn to 4-5 % and the difficultychange after that it will probably be negative to mine dual, but it all depends on exactly how much you pay for power and how much scrypt hashrate you loose by mining both scrypt and BTC and how profitable scryptmining is each day and that seems to vary a lot. You can try coinwarz
to get a good estimates on what will be best for you.