If you had the choice to buy only one of the two today which 1 would it be?
Monero or LTC? don't really need brains to decide on this

I prefer Monero, even though Litecoin has the huge market cap.
XMR maybe have a good future and the price still can raise more than 0.02
BTC LTC is just an old coin, but despite being old, litecoin is still in demand by many traders for some reason.