They can both serve as perfect statements for Kanye as an artist and person and they were both top moments (Power as a single and Runaway performance) of 2010.
From MBDTF
Every superhero needs his theme music – this is Kanye’s: a brutal, explosive exposition of everything he has to offer, sampling King Crimson, referencing Malcolm X and raising a solemn middle finger to his detractors.
From My Beautiful Dark Twisted Fantasy
Kanye’s Taylor Swift moment at the 2009 MTV VMAs is one of the controversies leading to this rueful, piano-led apology about his own personality and failures. “I had to come back as a better person”, he says.
TheBronxGirl 11 
I blame the people who didn't commit and gave Power a 7.5 instead of an 8