I own a pair of Coincidents, and am familiar with many of the other models. In addition to that, I have a local DeVore dealer, and have spent a fair amount of time listening to them.
For one, the Coincidents are far easier to drive. No question about it. The DeVores may look good on paper in that regard, but I've seen a lot of tube amplifiers just never bring them to life, so if you are interested in pairing the speakers with a moderately powered tube amplifier, that might be a bit of a consideration. Other than that, the DeVores are a bit richer and fuller, while still offering a commendable amount of detail, clarity, and information. The knock on the Coincidents is that they can be a bit too forward in the wrong system.
For what it's worth, my own opinion is that if I were interested in low - moderately powered transformer coupled tube amplification, I'd go with the Coincidents. If I were interested in a tube amplifier with some power than I'd encourage you to find a pair of DeVores to audition, as things are going to come down to personal preference. For a solid state amplifier, a system that is already a bit on the hot side, or a small room, then I would probably give the more serious consideration to DeVore.
