Lychee luxe is like red-coral-pink with fine multiglitter and Pink Lemonade is pink with tiny hint of coral. PL is more wearable to me. I would say to try them on.
definitely Lychee...it's the one and only lipglass I've completely used up. I use it for work on models/clients, and it covers a broad spectrum of skintones.
I just got Lychee Luxe lipglass today and I have to say, I LOVE IT!!! It's a very unique shade, and seems to have some golden highlights in it. It's very pretty. PL seems to be more of a pink shade, and not thaaaat unique, imo.