I doubt these are the same size, and they are certainly not compatible with Danny's crossover design. The EMIM drivers have a 3 ohm impedance, while the NEO 10s are 8 ohm. And I suspect that the sensitivity, frequency response, and directivity are also quite different.
It may be possible to find BG Neo10 drivers - you can try contacting Parts Express. They don't have them listed any longer, but they may be able to special order them or have some inventory still available. I got mine from them in December.