Most altcoins use scrypt instead of SHA256, so that it's harder to make FPGAs/ASICs, thus relatively easier for people with GPU/CPUs. This is because if only p

Most altcoins use scrypt instead of SHA256, so that it's harder to make FPGAs/ASICs, thus relatively easier for people with GPU/CPUs. This is because if only people with specialized hardware could mine, the network could be more vulnerable to 51% attack from a well-funded team, versus when every person with a graphics card can mine. See https://litecoin.info/Comparison_between_Litecoin_and_Bitcoin#SHA256_mining_vs_scrypt_mining https://litecoin.info/Comparison_between_Litecoin_and_Bitcoi...