I work at a web services company, and am being asked to interview a candidate who, if hired, would be my peer. I've never conducted any interview before, let alone someone who would be my peer, and have no idea where to begin, and whether I should proceed any differently given that I am interviewing a potential peer rather than a subordinate.
The only time I've been interviewed by peers -- at a former job -- it was a very informal and unorthodox interview (my then-future coworkers very much went against the company grain in pretty much every aspect, and even admitted to me after I was hired that they didn't conduct the interview as they were expected to, and all they cared about was that I was competent and would get along with them).
Should I conduct this any differently from a normal (non-peer) interview, and are there any particular questions I could ask that might not be relevant/useful otherwise? Thanks!