Is Litecoin Just a Testnet for Bitcoin or a Vastly Undervalued Cryptocurrency?

I read a critique on Litecoin recently. The basic premise was that Litecoin is just a testing ground or testnet for Bitcoin. The author seemed to insinuate that Litecoin had little value other than testing new technologies prior to Bitcoin implementing them and was not a valuable standalone cryptocurrency. Mike Novogratz also chimed in recently, [...]