User blog comment:MilitaryBrat/Lord Voldemort vs Darth Vader/@comment-4552610-20111217154652/@comment-181289-20111218051201

Actully Force choke, like Froce Lighting has the potientail to be an instant kill, but the nature of the Sith means they may not use it to it's full strength in order to punish there opponents, slowly killing them as opposed to the more merciful instant death results. But even if Vader goes with the slow kill it hard to think clearly will your being choked, you panic and your brain is losing oxygen so your thinking is affected, and when your casting spell's, concentration is important, an when it's non-verbal I believe it's even more so, and being choked out isn't really conducive to a clear though process. And the Force choke has a number of advantages over the killing cusre. Vader for one doesn't even have to be facing his oppoent to use it or even had a clear line of sight to do it, he just has to be aware of the person presence, and becasue he can sense living beings in the force he'd always know where his oppoenet was. Voldemort could be hiding in a bunker and Vader can still crush his wind pipe. The Killing curse on the other hand requires that he have and un interupted line between him and his target, anf soldier object between him and his oppoent stops the spell, where as Vader only has to will Voldemorts throat to collaspe in oder to kill him.