As of writing this article, 1x Bitcoin is worth approx 60x 1 Litecoin.
If we adjust this to account for the coin circulation 1 Bitcoin is worth 15x 1 Litecoin. Given Litecoin has a shorter block time, lower transaction fees and better scalability I would consider it undervalued.
Of course there are many other factors to take into consideration here so I'm keen to get your views!