I will be analyzing Darth Malgus at the height of his power, within the timeframe of The Old Republic MMO, specifically the False Emperor Flashpoint. In addition to his appearance within the game itself, I will also be referencing his appearances in the Deceived, Hope, and Return cinematic trailers, the tie-in novel Deceived, and the short story The Third Lesson, with background information from The Old Republic Encyclopedia, the Book Of Sith, and Darth Vader: A 3-D Reconstruction.
I will be analyzing Darth Krayt within the timeframe of the Vector arc, immediately before his betrayal and death at the hands of Darth Wyyrlok. The strengths and limitations of the Vongtech implants Krayt possessed prior to his resurrection are simply more interesting to discuss, and his demonstrated power post-resurrection placed him on the level with Emperor Palpatine, and therefore out of Malgus' league. In addition to his appearance in the Legacy series proper, I will also be referencing the Legacy Handbook, the Legacy Era Campaign Guide, the New Essential Guide To Weapons and Technology, the Essential Guide To The Force, and the Essential Guide To War.
I will not be discussing Krayt's appearance in Fate Of The Jedi: Apocalypse, as his interactions take place exclusively in the Netherworld of the Force as an Astral Projection, where he demonstates multiple abilities that he lacks in the series, particularly Force Drain. It's the same reason why I refuse to discuss Grandmaster Yoda's battle with Darth Sidious in the TCW episode Sacrifice: It is, for all intents and purposes, a dream sequence, and therefore cannot be taken as a definitive or accurate demonstration of either combatants' capabilities.
With all of that out of the way, let us begin:
The treachery of Malgus the Betrayer was motivated by his adherence to classical Sith ideology, where the Dragon of the Sith championed the supremacy of the Order at the total expense of its tradition. Darth Malgus believed in evolution through competition, strength fostered through fair play. As brutal as he was, he was a champion for the rights of others, even if he was only defending their right to be assholes. Darth Krayt believed in order above all else, power magnified by its focus. The purpose of the individual was to serve the collective, and to lay down their lives if need be.
If these two infamous Sith Warlords were to meet in battle, who would win?
The Old Republic Encyclopedia - The Sith - Darth Malgus, Pg 168-169 - [09:23], [09:47], [09:58], [21:38], [22:22], [37:00], [40:30]
The Old Republic: The Third Lesson - [09:52]
Darth Vader: A 3-D Reconstruction - Implants and Organic Components, Pg 18 [10:24] - Skeleton and Nerves, Pg 20 [10:32]
The Old Republic: Decieved - Chapter 2 - [11:48], [25:50]
The Old Republic Encyclopedia - The Sith - Sith Warrior, Pg 176-177 - [12:34], [23:53]
Legacy Era Campaign Guide - Chapter X: The Galactic Empire - Influential Personalities: Darth Krayt, Pg 169 - [16:19], [28:49], [44:51]
The New Essential Guide to Weapons and Technology - Defenses and Armor - Vonduun Crab-Shell-Plated Armor, Pg 126-127 - [16:24]
The Old Republic: Decieved - Epilogue - [22:17], [37:55], [38:03], [38:22], [39:40], [40:03]
The Old Republic: Designing the Dark Side - [22:32]
The Old Republic Encyclopedia - The Sith - Weapons and Armor, Pg 188-189 - [22:36]
The Complete Visual Dictionary (2006) - Episode II: Attack of the Clones - Lightsaber Combat, Pg 128-129 - [22:41]
The Old Republic: Decieved - Chapter 11 - [25:27]
Barely Tolerable: Alien Henchmen of the Empire, Part 2 - [29:24]
Book of Sith - Absolute Power - The Book of Anger, Pg154 - [36:28], [39:17]
The Old Republic: Decieved - Chapter 1 - [36:43]
Book of Sith - Darth Malgus' Journal - Rim Campaign - Day 460, Pg 63-64 - [37:12], [39:30]
Book of Sith - Darth Malgus' Journal - Rim Campaign - Day 133, Pg 49-50 - [37:34], [37:50]
The Old Republic: Decieved - Chapter 8 - [39:54]
Revenge of the Sith - Chapter 3: The Way of the Sith - [51:03]