Here's the drop tables with some rate variation indicators.
Ultimate difficulty when not specified.
Harmonic Resonance Core
Garanz 1 (Very hard) - All IDs
Baranz 1 - All IDs (3.5X higher)
Virus Shield: Vol Opt
Vol Opt (Very hard) - All IDs
Vol Opt ver.2 - All IDs (5X higher)
Water Gun
Gi Gue (Normal) - All IDs
Gi Gue (Hard) - All IDs (2X higher)
Gi Gue (Very hard) - All IDs (4X higher)
Gi Gue - Viridia Greenill Bluefull Purplenum Pinkal Redria Oran Whitill (6.5X higher)
Kroe's Sweater
Olga Flow (Very hard) - All IDs
Olga Flow - Skyly Purplenum Pinkal Redria Yellowboze (20X higher)
Godric's Cloak
Migium 1 (Very Hard) - Bluefull Purplenum
Dorphon Eclair - Viridia Skyly Bluefull Purplenum Oran Whitill
Sue's Coat
Deldepth - Viridia Bluefull Oran
Girasole
Kondrieu - Viridia Greenill Skyly Bluefull Pinkal
Soul Booster
Saint Milion - Greenill Skyly
Proof of Sonic Team
Gal Gryphon - Viridia Bluefull Pinkal Redria Oran Whitill
Dark Falz - Greenill Skyly Purplenum Yellowboze (2.5X higher)
Samurai Armor
Olga Flow - Viridia Greenill Bluefull Whitill
Saint Milion - Purplenum Oran (2X higher)
Kiss of Death
Delbiter - Greenill Skyly Purplenum Pinkal
Ill Gill - Viridia Bluefull Redria Oran (same rate)
Olga Flow - Oran (47X higher)
Fury of the Beast
Girtablulu - Viridia Skyly Bluefull Pinkal Redria Oran Yellowboze Whitill
Stellar Shard
Shambertin - All IDs
Saint Milion - Viridia Bluefull Pinkal Redria Yellowboze Whitill (2.5X higher)
Kondrieu - Purplenum Redria Oran Yellowboze Whitill (3X higher)