Specs wise
Upsides
73 Super Articulation 1 voices ( all must haves are there; SA concert gtr/ nylon gtr, SA saxes)for new $1000 keyboard ( remember Tyros 2 with 42 SA 1s?)
Decent piano sound (Live! Concert grand) , not new
415 Styles including 2019 Latin and dance styles
Multi-pads that can be sync to audio
16 tr recorder ( not comprehensive as Korg) and style creator
ARP and 2 live knobs
Ability read SFF & SFF GE style files (tons of free style library unlike Korg or Roland)
100 MB on-board memory for expansion data
Roland GS song playback in this price range
Unison & Accent to let Styles playback follow performance ( need to play it)
Compatibility with Rec'n'Share Apps and Mic input ( which has compression and Eq but no VH) - your audio with be in digital domain and easy to share
This can be great if you can upload within the app to share the recorded audio to your iPhone/ iPad for backing tracks without a need for computer ( sx700/900/Genos doesn’t have this feature). Need to read manual for details
Midi songs/ style play to audio recorder to UBS drive ( Wav. only)
128 poly
Better DAC
2 foot pedal ins ( you can use volume and damper both at the same time or use foot switch to trigger function while having sustain)
8 kg ( one of the lightest gigable arranger with mic in, direct song play ,style creation/seq and both Mod/ Pitch wheels and 2 footswitch ins and built in speakers)
Downside
No Mp3 playback ( pa300 , even Ek 50 can do this)
No midi sockets ( unfortunate trend for sub $1000 keyboards)
Same keys as 670 ( said to be in improvement, need to confirm)
You can download manual and data list from EU website
https://europe.yamaha.com/en/products/mu.../downloads.htmlKorg should step up the game the new sub $1000 arranger ( Pa400?) correct the hardware mistakes of Pa300 ( 1 shared output/ 1 shared footswitch in)