The best way to find out, is of course to visit
your dealer to try out the keyboards.
It's your ears, needs and taste who are the real
"Judge" at the end.
If it is only the styles who are the main issue,
I think you'll find the SD1 to be "The Winner".
They sure are good, plays very well, and besides
of that, there is a huge library of add-on styles
to choose from.
And not to forget, the SD1 is European
Kind regards
GJ