Thank you for that but in the mean time I was so frustrated by the "check the calculator" answer that I googled "litecoins MHs 6950" and eventually found out the MH/s value for my Radeon 6950 2GB.
So I'd be doing 350 MH/s in Bitcoin and 0.42 MH/s in Litecoin. That would be $1.068 net profit for Bitcoin and $2.178 in Litecoin with electricity at 0.10 $/KWh. But here's the funny thing. I have two Radeon 6950 (I only used one in the calculator). And I think one of them doesn't crash with the 6970 bios. So when I hit 710 MH/s I hit parity. Except if my electricity cost in not higher. Because if it's 0.12 $/KWh then I still won't hit net profit parity with Litecoin.
So what do you recommend me?
Find your card power output here in terms of wattage and Mhash for BTC
https://en.bitcoin.it/wiki/Mining_hardware_comparisonIf you don't want to scroll hit ctrl+f and type in your model to search
Then go here
http://www.bitcoinx.com/profit/Plug in your numbers
Calculate and then determine power costs.
Analyze the numbers and determine if you can make profit under BTC.
If you cannot profit from BTC look at this site to determine if other coins would be worth their value mining.
http://dustcoin.com/miningIt can provide insight to BTC vs other crypto currencies
You will know what to expect and can make an educated decision. Haven't seen anybody else make it any easier to figure out, but you still need to put in like < 10 min of work. Nobody is going to do it for you, so if you can't get that done then perhaps it isn't for you.