I have A la Nuit, and a bit of La Haie left in a decant. They are similiar, but La Haie has a bit of a green edge in the opening, and is a thinner, higher pitched, sweeter fragrance. It's jasmine note seems more like pikake jasmine, and there is a waft of honeysuckle. It can become cloying in a closed space.
The A La Nuit is deeper, more indolic, with a more natural floral sense. It is long lasting, and carried a true jasmine note clear through the 6hour drydown. The heart is accented with clove, but very lightly.
The real sticky decision is A la Nuit compared to TDC's Jasmine de Nuit. They both have the same lovely jasmine note, but JdN uses cinnamon and anise as the accent spices, and more abundantly. It's jasmine retreats in the dry down revealing a wood tinged, warm vanilla musk. I usually wear A la Nuit in the summer, and Jasmine de Nuit in the winter.
I think A la Nuit is the truest pure soliflore, and it very lovely, but I often prefer the complexity of Jasmine de Nuit.
Hope that helps!