Similarities-

Believe they are immortal
Have no soul
Albino skin
Can disappear in a flash
Eyes change colour involuntarily
Can read minds

Differences-

Voldemort has talent
Voldemort is eternally power hungry, Edward is just eternally hungry... yuck.
Voldemort has an epic and record breaking movie
Edward is a ginger, Voldy is not.
Voldemort has earned our respect. Edward has earned our disgust