Art Audio Carissa vs deHavilland 845 tube amps

Has anyone compared the Art Audio Carissa and the deHavilland 845-based amps? Both appear to be very dynamic and musical amps, but the deHavilland is apparently somewhat veiled in terms of detail. I understand there several current production 845 tubes now available. These would be driving 88 db speakers with a tube-friendly flat 4 ohm load. I would appreciate any inputs on these products. Thanks.