Could you clarify what you mean by "Transferring directly from the keyboard itself to a DAW," as I thought
all MIDI keyboards can do that?
As far as "through a USB being able to transfer like 32 tracks directly into a DAW," this is possible because the MONTAGE can use two MIDI Out ports at the same time-- the MIDI Out DIN port being one, and the USB-MIDI port being the other.
Yamaha came out with three or four "levels" of their XG standard-- three if you consider XGlite to be a "lite" version of XG Level 1, or four if you consider it to be a level of its own. XGlite and XG Level 1 can use one MIDI port; XG Level 2 can use
two ports (32 channels); and XG Level 3 can use
four ports (64 channels).
https://en.wikipedia.org/wiki/Comparison_of_MIDI_standards
Some of Yamaha's tone generators and higher-end arranger keyboards can use two ports, and at least one of their tone generators can use four ports, but I don't know if any of their keyboards can use four ports. I'll check later and see about making a list of them.
You should be able to transmit the MIDI channels of both keyboards' ports to your DAW at the same time if you use an audio interface with appropriate connections.
And if, by chance, you were talking about audio tracks rather than MIDI channels, I'm pretty sure neither the MONTAGE nor any other keyboard can output more than one audio signal at a time (counting stereo as "one" signal)-- i.e., the sounds from all the channels get mixed together and sent as one signal. Some keyboards provide a variety of options for audio output-- USB port (Yamaha's arrangers don't send audio over USB, but some of their synths do), headphones jack, separate jacks for left and right channels, etc.-- but I haven't heard of any that let you direct specific MIDI channels to play over specific audio connections. An obvious exception would be if you pan some MIDI channels hard left, and pan the rest hard right, to get two mono channels. You could do that on both keyboards, then connect their audio outputs to separate Audio In connections on your computer (if it has more than one).