The Pomegranate Noir Fragrance Chronicle has Raspberry, Casablanca Lily and Guaiacwood mini colognes. This was the first Chronicle, and is still the best in my opinion; the accent colognes are lovely in their own right and the combinations work very well.
Red Roses - Moroccan Mint Leaf, Ice Rose and Honeycomb - interestingly, this wasn't the typical fruit/flower/wood Chronicle accent combination. That might not have worked with Red Roses, which is quite a clean scent (although I do like it with Nutmeg & Ginger, which is woody). This Chronicle was originally released for Valentine's Day, and was a pretty, romantic combination (although I didn't think the Ice Rose added much to the original scent, the Moroccan Mint was lovely with it).
Lime, Basil & Mandarin has Mandarin, Sweet Basil and Amberwood. (Fruit/Herb/Wood). I don't actually care much for L, B&M as a fragrance (it turns quite soapy on my skin) although I like it in the shower gel.
The new English Pear & Freesia Fragrance Chronicle has King William Pear, Freesia and Patchouli mini colognes. Like the Lime, Basil & Mandarin, instead of giving different scents to combine, the mini colognes accentuate the main notes of the focal cologne. To me, this is Jo Malone phoning it in; what's interesting to me about fragrance combining is using two very different colognes and seeing how they work together. Making a floral/pear cologne a bit more pear-ish feels like cheating to me.
In summary, if you know someone who adores the English Pear & Freesia cologne, this would be a lovely gift. If you want to introduce someone to fragrance combining, I'd still recommend the Pomegranate Noir Fragrance Chronicle first though.
Disclosure: PR sample
PS: Pear starts looking really odd as a word when you type it out over and over again.