Check the reviews and you will find the Kawai comes out tops in all areas.
As it is the sound quality of the Yamaha P125 pianos is to my ears superior to the Roland FP10/30.
Watch this for a side by side comparison
To me the Kawai comes first in sound then the Yamaha and Roland brings up the rear, but do remember these are all budget starter DP’s
I am no fan of Yamaha despite buying one as a stop gap DP in preference to a Roland, for one thing the Yamaha and the Kawai both have much superior Polophony to the Rolands. Changing instrument sounds with the Rolands is a two handed task, pressing and holding the function button plus the group button then pressing one of the keybed keys that correspond to the sound you want, this is a total pain for me and the main reason I discounted the Roland.
Do visit a music store and test them all out or if you buy online do check the returns policy and when you get the DP do play it as often as you can during the returns period to be sure you have bought what suits you.