To my nose A la Rose is more of a pink, pretty rose while Une Rose is a deeper, red rose with some earthiness, definitely a little more intense.
Lipstick Rose is a rose/violet fragrance, somewhat reminiscent of fragrant cosmetics. It's a very pretty, creamy scent, but definitely not a rose soliflore. As for larger decants and samples, you can also look into decanters like Surrender to Chance and The Perfumed Court.
@babybluegirl, in the realm of citrusy florals, you can also check out Eau de Magnolia by Frederic Malle. I forgot to mention it earlier, probably because although I like it, it wasn't a love for me.