For my needs now the ROLAND BK9 is better then all mentioned...

at this stage all listed ...
they are all equal in sound & style,.....most just use an arranger kb in their bedrooms pseudo so called "studio" for their own personal pleasure so what's the difference which one you have if you ain't playing out for audiences..just put on your headphones and play music for yourself to enjoy. The whole whats the BEST saga is getting kinda old at this point ....too many choices,.....too many methods to play music....just choose you tool of choice and enjoy it
for weaknesses and strengths belong to the player themselves always ..
Most just want to turn it on and start playing not make an Einstein's theory of relativity project out of just playing an arranger KB or whatever...that said I love my BK9 !

Merry Christmas to all.