I have a 2405FPW and just got 3x U2412Ms in (not had chance to play with them yet!)
As others have said, I doubt there will be a problem with colour parity after calibration.. but the 2405FPW will definitely lag behind slightly. The U2412M has basically no input lag.. personally I don't notice much lag on the 2405FPW when using it individually, but since I have it next to a BenQ FP241W (A-MVA) - moving a window up and down when split between the two makes it noticeable.
I'll be doing a 5x1P, so I doubt it'll matter much with these two *VA screens on the wings.. but I'd be wary of pairing them up on a 3x1P (maybe 3x1L would be better..)
As others have said, I doubt there will be a problem with colour parity after calibration.. but the 2405FPW will definitely lag behind slightly. The U2412M has basically no input lag.. personally I don't notice much lag on the 2405FPW when using it individually, but since I have it next to a BenQ FP241W (A-MVA) - moving a window up and down when split between the two makes it noticeable.
I'll be doing a 5x1P, so I doubt it'll matter much with these two *VA screens on the wings.. but I'd be wary of pairing them up on a 3x1P (maybe 3x1L would be better..)