Sure. Interviews in general are better than a guest post because it requires less work from your guest and you get to ask follow up questions and get answers that you think your audience will find interesting. Late night hosts interview their guests, they don't usually invite guests on and have them monologue.

ReplyAll is better than the standard way of doing interviews because the questions are not predetermined, there is active back and forth and the readers get to follow the conversation as it unfolds.