It is indeed difficult if we have to distinguish between Litecoin and Cardano because these two coins have different principles. In terms of how they work, they are also different, all their features are also different. If I were forced to choose, I would definitely choose both, maybe the division of both is 50:50.
I have funds of around 20 dollars and I will choose Litecoin with a value of 10 dollars and for the Cardano coin I will choose 10 dollars too, this is fairer than having to think several times to choose between one of them. As far as I know, Litecoin also has a way of working with Bitcoin and its system is POW, it takes hardware to be able to get Litcoin by mining.