So called review pro’s from websites are clueless of what Yamaha put what type of keys in price range. Most of online website pro reviews will compare the specs and write the review without playing them.P125 (700$) , MX 88 ($1000, now $1100) and all sub $1000 88 keys pianos use GHS action. Not GH and GHE and NWX actions are for more expensive $1500 models. GHE is more playable for rapid repetitive notes and trills than GHS or Rolands sub 1000 FP30x . No sub $1000 pianos has Bösendorfer Samples either. Just CFX. The good thing is VRM and natural! Piano samples with some limited adjustments. Old “warm live!”
Piano samples will sound less bright.

Mx88 is 88 keys ( same key action) and is 30 Ibs.
Xe20 is 88 keys with speakers and is 25 lbs.

Yamaha can definitely do better with making less than 47 Ibs but they want to prevent the OMBers buying this instead of sx600. There is increased demand for arranger with weighed keys. Up to now, most lack one or more features: mega voice style compatibility/ 4 variation/ style writing/ 16 track seq , SA quality right hand voices, etc. in the past , in Korg world, they had Havian ( pa300 with 88 keys)( light weight ) and pa588 ( pa500 in 88 keys but heavy and expensive). Both have great editing and had all features as their related arrangers.
Unfortunately, if xe20 is pa300 ( instead of ek50)with 88 keys with around 35 pounds or less, it will be a direct competitor to Yamaha. Korg missed that boat by going cheap route by using year 2000’s Pa80 gen styles.




https://usa.yamaha.com/products/musical_instruments/pianos/p_series/dgx-670/specs.html

https://usa.yamaha.com/products/musical_instruments/pianos/p_series/dgx-670/features.html#d1344578