Bitcoin = Gold
Litecoin = Silver (biggest Alt after BTC)
the rest is a scam.
some people call Litecoin a scam.
It is basically a copycat of BTC with some parameters modified, and the dev team is not really the most active we've seen around.
Litecoin wasn't actually that innovative given that Tenebrix had already solved the problem of integrating the scrypt algorithm into a cryptocurrency. What Litecoin did well was creating a fairly launched, well developed, and far less buggy product than the alternatives at the time.
Also, Litecoin was originally designed to be resistant to GPUs back when Bitcoin mining was dominated by GPUs. The idea was that those without expensive GPU mining rigs could still mine on their ordinary PCs. Litecoin failed in this regard but managed to keep a step behind Bitcoin in terms of the transition from CPU to GPU to ASIC mining which insured that it always had a niche to fall back on.