Both BTC and LTC are mined pretty much solidly with ASIC's. Not GPU and certainly not CPU.
However the difference is you can still mine LTC with a GPU, and earn a bit. But once you calculate the cost of electricity you are losing money each day so not worth it. If you live somewhere where you don't pay for power, or shudder at your parents, and don't mind explaining why their power bill went up $50 so you could make $5, then GPU mining is still a possibility. But best advice I can give you is to find a coin where ASIC's are not yet available, and mine them, as you can still make a profit on those coins.
That's got the tip ,gonna look in to it