To be honest, I think Roland G-70 is closer to the Ketron live feel than any other
brands I've heard so far.
That in mind, I would not doubt that Roland are capable to compete soundwise if they
ever come up with another top of the range arranger.
Besides of that, the OS is way more logical and understandable than Ketron, well at
least as it was before Audya who I've not tried so far.
But that's of course my 2 cents.

Also I tend to think that Korg will be on the sceene with new things before Roland
who I'm afraid (as Diki mention) won't bring up any new top arranger.
Remember they cut the style cooperation with MidiSpot, and they don't support with
any new styles etc at the www.rolandkeyboardclub.com anymore, just old stuff.

Cheers
GJ