Litecoin for me since i hold more litecoin than bitcoin. But on a serious note litecoin is like bitcoin's younger brother who is supposed to help the big brother. Litecoin is faster in transactions and have less transaction fees while bitcoin on the other hand has more fees and is slower compared to Litecoin. i won't say Litecoin will overtake bitcoin but, it has got lot of potential and with the lightning network it will become more faster. The CEO and founder of Litecoin is Charlie lee who is a very good leader who knows what he is doing. So we can expect a lot coming in future. The founder of bitcoin is Satoshi Nakamuto whom is still unkown to us. Anyway for now I would say Litecoin over bitcoin day, my opinion won't change anytime unless bitcoin proves me otherwise.