A&H filters are more extensive than pio's. plus, for breaks/progressives harmonic mixing isnt all that amazingly interesting...
Pioneer filters can do about the same as the A&H one's but are (offcourse) different in some ways. DJM-800
has an individual parameter per channel (A&H can only do on 1 channel per filter). Pioneer combines the High pass and the Lowpass to 1 filter. The Sweep filter on the DJM can be compared with the bandpass filter of A&H.
Pioneer added the Harmonic mix (very nice for accapella's and samples) and the bitchrusher, which I've only heard on studio effects before.
On the DJM-800 you also have 13 effects and a better handling with the optional EFX-1000.
I've compared the sound quality of the Xone next to the DJM-800 in a studio. When you use only analogue
signals they are of equal quality
But when you hook up an CD player via the digital connection
you will be amazed of the big sound difference
... I was a little bit shocked when I first experienced it, it gives a more wide stereo field and more and brighter details can be noticed. We've also measured the frequencie replonse on a spectrum analizer. Analogue connected the curve starts to drop around 17-18kHz for both mixers, but the DJM goes on to about 19.5kHz when connected digital. Allthough nobody can hear a tone of that frequency, this does make you experience a better sound.
But do the test for yourself and go to the shop, put both mixers to the side and try them out
But also in club situations I've heard several technicians comming up and complimenting the DJM with it's sound.