Listen to "The New" and "Untitled," and then go back and listen to "Mr. Brightside" and "Glamorous Indie Rock & Roll." There is no comparison, really. Interpol are far better. They have very strong musicianship, which is something the Killers sorely lack. Furthermore, while some accuse Interpol of being heavily derivative of the British Post-Punk scene (bands like Joy Division, The Chameleons, The Smiths, and Echo and the Bunnymen in particular) as well as NYC bands like Television and the Voidoids, at least they bring their own flare and some sense of originality to their music. It also has a lot of emotional depth, and is very atmospheric and beautiful. The Killers' music is totally banal, nothing even remotely interesting about it. It's mindless music, devoid of any technical merit. And Interpol's songwriting is a lot better. Seriously, just listen to "The New."
And I don't really think Banks sounds like David Byrne at all.. um.. but whatever.