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'd rather have a share of both. Both are dependable coins and in circulation. Although Monero is more volatile right now because it is actually younger than Litecoin. Litecoin's price is almost not moving but there is profit when long term goal is applied. New coins are hot in the eyes of traders.