Both have a lot to offer. Guitars are probably a little better overall on 950. BK9 organ is outstanding. Choir/pads are better on BK9.
Of course drums are better on BK9, except for the style Yamaha style that used audio drums.
I also preferred the bass lines on Roland.
I owned both and liked them both. What is NOT shown is lack of vocal processing/harmonizer, and lack of ability to display text files on Roland.
As far as pianos, I thought they were both "fine".
Another big plus for Roland is the facility for using their lightweight and affordable 6-switch foot controller. And more keys if you want/need them.

Adding the VP7 to the BK9 could be a nice combo.

I liked the organs on the Roland better as well; more authentic to my ears...also the fact it has the sliders/drawbars for easy access.

Otherwise, it's a kind of apples to oranges comparo as the Roland has 76 keys, no vocal harmonizer and no speakers, where as the S950 has 61 keys, a VH2 and a powerful set of onboard speakers.

Personally, I think the Yamaha PSR-S750 (uses same great speaker system as S950) is a much better deal if'n you don't need VH, 76 keys or gimmicky audio drum styles.

Again, as with the Korg vs Yamaha...choice is personal and subjective, and I could easily gig with either BK-9 or S950.

Ian

PS...the BK-9's Chord Sequencer does not respond to transposition...very big flaw in an otherwise useful feature in my opinion.

Somehow many Roland sounds ever since i owned a D50 allways sound a bit metallic to me.. But then thats just my ears..

Of course you can add peripherals. I much prefer all-in-one package. Set up, plug in and play.

For studio work where you never take the Kb out gigging it's fine to have all the extra devices hooked up you need for your projects, etc, or at home.....

But it really doesn't make any sense to lug all that gear around day after day playing jobs and setting up in different venues each night,.... so the less is more "All in One" KB is preferred IMO.

I couldn't hear enough difference between the two to make me want to pay another $1,000 for the Roland over the cost of the S-950.

They both sounded great, particular in the hands of a skillful player,

Gary

See... i allways prefered having 2 keybeds... Currently only have one, and in the market of adding a 2nd keybed, then its smarter to add a keybed with sounds...

So basically one could have both the Yamaha and Korg sounds, best of it, they really add to eachother... where one is strong, the other isnt.