Here is what you have always wanted to know about it but were afraid to ask...

My Manifesto is the same fragrance but in the EdP concentration as opposed to Manifesto that comes as EdT.
Isabella Rossellini and I were born on the same day, she is a few years older than I am but I always wanted to think of her as family. :wave: Behind the beautiful facade, this girl has brains and it is a huge plus in my book. "Imperfection charms me, familiar things move me... " she said when Manifesto was first introduced to public at the Lancaster presentation in the Netherlands. What is it that makes Manifesto unique? It's imperfection personified! It is not a cologne (citrus is not very pronounced in it and I have hard time to name it -- mandarin? grapefruit? bergamot?), it is not strictly floral (despite its floral heart) either. Herbal, green, grassy? It is. Fresh, marine? Somewhat. Official notes are:
Top: basil, black currant leaves, white pepper, mandarin;
Heart: Rose, peony, sweetpea, jasmine, lily of the valley;
Base: chestnut, sandalwood, white musk.
What is similar? Many many fragrances, light, crisp, modern, often characterized as green.

It is not the greenness found in Balmain Vent Vert though, when the latter can become heavy and somewhat oppressive. Here is my 12 suggestions for you to explore:
CK Truth -- grassier and muskier;
Hermes Un Jardin sur la Nil -- citrucier, tangier, less musky;
Kenzo Parfum d'Ete -- more floral, less musky;
Lanvin Oxygene -- more powdery, heavier;
Shiseido Energizing -- more green tea with jasmine;
Diptyque L'Ombre Dans L'Eau -- more roses;
Estee Lauder Pleasures -- cooler, sweeter, different flowers;
Sonia Rykiel L'Eau de Sonia Rykiel -- marine saltyness, powdery iris, more of a match with Oxygene;
La Perla Bleu -- creamier, but more aquatic;
YSL In Love Again -- applied lightly (same as Fragonard Eau Fantasque -- which has more bubble gum to it);
Jacomo Silences -- different fragrance altogether, same style and mood.
While Manifesto does not make it in my current Top 10, it is a reference scent for sure, which means that I compare other fragrances to it finding similarities and differences to it. In more general terms, please try to identify what is it that you like about Manifesto -- sparkling top? (Moschino Friends) vulnerable heart? (L'Eau d'Italy Paestum Rose) slightly woody-musky base? (Scents of Time Pyxis) -- and move in this direction.
Hope this helps.