TLDR
Litecoin provides no significant advantage over BTC now that scrypt ASIC's are in the wild.
If your not BTC or a POS coin then you will have trouble.
I wouldn't never invest in a POS coin , why would I spend my coins if I could stake them and get more? , POS encourages hording IMO and also gives the rich more coins for doing nothing.There's a reason why Peercoin won't ever be number 2 and it's 24 hour volume is $129,675 compared to litecoin's $2,105,900