So I was having a thought and I figured I would inquire to you bunch on here about this matter for those interested in Star Wars.
What would happen if Galen Marek (Starkiller) and Kahan were to fight?
For those that don't know, Starkiller is Darth Vader's 'secret' apprentice just prior to the Battle of Yavin whom he raised in an attempt to overthrow the Emperor (or as a ploy by the Emperor to ferret out dissenters in the Empire) while Kahan is my OC character who was trained in secret prior to the events leading up to the Phantom Menace.
I'm going to try and be unbiased in presenting what I know of the two characters, submit my opinion, and then see what yours is. Sound fair?
As far as raw power goes, Starkiller wins hands down. He is a powerful telekinetic, more powerful than Darth Vader and on par with the Emperor. Kahan by comparison is relatively weak in telekinesis, he's able to shove objects and people around but has very little control over it and another telekinesis user can easily counter his abilities. In addition, Starkiller is able to use Force lightening extensively, an ability that Kahan lacks altogether.
Saber ability is also very tilted towards Starkiller. He's been fighting with a saber for most of his life and can fight both Palpatine and Vader to a standstill and defeats several other prominent knights and masters in his time, however his style is highly erratic and unrefined, relying on brute force rather than finesse to shatter an opponent's defense. Kahan is good, and his dual saber style is far more versatile than Starkiller's single saber style, especially since he can alternate between a dual saber style or a dual wielding style as need be. However for all that, Kahan's fighting ability is rudimentary and he does not typically stand up well in prolonged saber-to-saber combat. This boils down to a question of endurance and adaptability in all honesty, how well Starkiller adapts to Kahan's shifting styles and how long Kahan can last against Starkiller's unrelenting assault, it would be a matter of luck more than skill as to who came out on top here.
As far as telepathy and suggestion go, hands down Kahan wins here. He specializes in illusion and misdirection, able to bend an opponent's mind to the point where they cannot even see him if he focuses. Starkiller on the other hand can handle rudimentary Force suggestion but seems to have no mastery of more complex abilities, this is not to say that he couldn't, but from what we're shown he seems to have been focused on being trained in the combat oriented aspects of the Force instead of the mental aspects. Kahan's strengths play right into Starkiller's weaknesses, as the latter is shown to be highly susceptible to illusions and repeatedly encounters them in his life and is frequently thrown off by them. This combined with his unstable emotional and mental state means that if Kahan were able to get inside his head, Starkiller would have very little defense against him. Kahan could most probably have Starkiller swinging at phantoms while he simply walks away.
A further point in Kahan's favor is his ability to teleport and move through solid objects. His ability to teleport is highly limited as it is a major drain on his strength and he faces similar issues with walking through solid solid matter. However either ability could be used effectively against Starkiller if say, he started throwing shit at Kahan. It could also come in handy if say, Kahan wanted to get behind Starkiller and stab him in the back while shielding his presence. Starkiller has no comparable abilities to these.
So, I think it comes out in a sorta skewed tie. In a straight saber fight, Starkiller would win. However if Kahan got inside Starkiller's head, given his fragile state of mind, Kahan would be able to twist and manipulate him sufficiently to either escape or win the fight. Finally, if Kahan had to run, he could readily teleport himself to another location to get away from Starkiller, though at that point it would become a question of how far he was able to teleport and whether or not he had an effective means of furthering that escape.