I think they have been back to the drawing board at Pioneer since the SC5000 and that they use this model as an interim solution, since people are screaming for 4 deck standalone (but there is also a catch on this one, see below).
At the moment, in my eyes, Denon is seriously ahead of Pioneer in terms of hardware, features and Denon is much more progressive (luckily for us).
Then looking at this model, the XZ. It seems that this is again not a complete 4 channel standalone. Channels 3 and 4 are only suited for use with a LINK (computer or linked Pioneer player) or line/phono input. So no USB playback on those channels (at first side)
In addition, you again miss the number of line inputs that the prime 4 has (4 line, 2 phono) against 2 line/phono + aux on XDJ-XZ.
Pioneer has SEND, but misses ZONE. Pioneer uses TRS for booth instead of XLR.
Pioneer has 2x USB vs Prime 4’s 4x USB + SD. Pioneer has fixed FX, against expandable effects from Denon,
The wins for Pioneer based on the early pictures: I see a feedback reducer, but Denon could kill that in the software, I see Master EQ, but Denon could kill that in the software…
I could go on for a while, but this interim solution by Pioneer is certainly not going to be for me. It only shows me how far Pioneer is behind. The biggest downside is that only 2 channels of standalone are usable. Not that I’m anti Pioneer, but this release against a Prime 4 is again typical the Pioneer way of giving less for more money.