i heard the 42's good if you wanna use it as an effects unit aswell as a mixer as it has the direct usb link, plus you can filter external effects with the X-FX feature. 62's got the 4 band eq tho so probly better for actual mixing i guess?
can see from ur pic you have a djm 800 how come the switch to allen & heath the pioneer not cuttin it??
Ive had a Xone 62 for about 5 years now, Im now on my second one and still can't fault them, Ive bought a Xone 92 but sold this after 2 weeks as its a completely different mixer rather than a 62 with extra stuff as I expected, Ive used a 42 but in all honesty you cant beat a 62 for drum n bass, plus ontop of this its the mixer I come accross most often in clubs
The crossfader is utter toilet on a Xone 62, not sure about the 42 but the newer models I've used all seem to have a better one.
If you use that a lot then look into that.