They were similar enough as they rolled along. Everyone damaged to a greater or lesser extent, many hiding secrets nothing to do with the murder, and enough red herrings to sink a drifter. But when Vagn was nailed for The Killing you could look back and say to yourself, oh yeah, that bit when he said the other thing was a bit suspicious. I thought so at the time. By contrast, when Joe finally confessed, claiming he couldn’t stand the hiding any more, or some such twaddle, it was a huge let-down. So much so that we had to be flashed back to 59 days previously ... for any kind of resolution. What a cop-out.
I’m not surprised that Wikipedia tells me few of the cast knew the identity of the murderer during filming. I’ve a hunch the writer didn’t either. A shoal of red herrings alone is not enough for a satisfying dish.