Kabbalistic mainly that we search for the inner, symbolic meanings and how they interact with the Tree of Life. For instance, the disposition of food on the plate:
The 3 matzoth shmuroth are included in the plate, along with the six other items, in contrast with the prevailing Ashkenazic customs which include 6, sometimes 5 elements but exclude the matzoth.
The most notable difference lies in the added kabbalistic meaning. The symbolic foods are disposed in a way similar to the kabbalistic tree of life, and each item on the plate --and the plate itself--corresponds to a sefira (God's attribute or emanation).
Above, the 3 matzoth (unleavened bread) corresponding to the 3 upper Sefirot: Keter, Hokhmah and Binah ( Crown, Wisdom, and Intelligence)
-Below on the left, the betza (roasted egg) corresponds to the Sfira Gvurah (Judgment)
The egg symbolizes the birth of Judaism
-On the right side, Zeroa' (roasted shankbone) which corresponds to Hesed (Grace) stands for the sacrifice offered by the Bnei Israel as they were about to flee from Egypt.
Maror (Bitter herbs) is put in the center and represents the Sefirah Tiferet (Beauty).
Usually horseradish or escarole and/or or romaine lettuce Maror symbolizes the bitterness of life in Egypt.
Karpas (celery) below left, corresponds to the Sefira Hod (Glory).
Haroset: below right, corresponds to the Sfirah Netzah (Triumph). It is a mixture of crushed dates, almonds and wine (Syria), or black raisins and wine (Turkey-Greece), or apples, almonds, raisins and wine (Spanish-Portuguese), to symbolize the mortar used for laying bricks in Egypt.
Hazeret bottom of the plate, also a bitter herb used at one point during the seder between 2 small pieces of Matza.
Hazeret correspondws to the Sefira Yesod (Foundation)
The whole--the Plate itself) corresponds to the Sefira Malkhuth (Kingdom)