Despite there already being two other threads with the same purpose, I've scouted them both out and then some to compile this updated list of the item drops from chapter 11 as well as what difficulty they are acquired in.
Note: Items with the (?) next to them are unconfirmed as far as what difficulty (boss/purple chest) they are acquired and are merely guesstimates. I will update this list every few pages when new info is posted on the boards. Stats and effects of Soma's new souls and the new equips would be much appreciated.
Fuma Gear Note: According to posts in COLL1N's thread, each of the three pieces of the Fuma set have an MP Regen + effect, and these all can stack when the entire set is worn.
Normal Boss Drops: Healing Mail (Whip users/Shanoa) Thief Ring Muramasa Luminato (Shanoa)
Hard Boss Drops: Chaos Ring Nebula Muramasa +1 Yasutsuna +1 Luminato
Soma Souls: Oxocutioner: Spawns a sword in front of Soma that is thrown after a short time. Maxed spawns 4 swords that encircle Soma and damage enemies before being launched. Gyropyre Pejoras mask Flying Flower Hellmont Peepilliary Kung Fugu Chimyriad: Summons Chimyriad to shoot fireballs that split into multiples. (total of 8) Decapiclops Ryutotsuki: Summons an arm to punch the enemy. Maxed summons three arms around Soma for heavy damage.
Special: Simon's Plate (Drops from Hellmont enemy) Yasutsuna (Drops from Pejora's Mask enemy) Gambler's Glasses (Drops from Peepillary enemy)