"Yamaha's Answer to Kronos"...really??

That would mean that one is superior over the other..

Have you ever used (actually used properly / performed with or recorded with) a Kronos and a Motif XF?

The Kronos is arguably Korgs "Answer" to Yamaha as it came out after the Motif XF and has gone through a few generations and major feature releases since its release in 2011, (Motif XF released in 2010)

There is no "better" machine between the two as they both have equal strengths and weaknesses over each other in different areas.

If this new announcement is in fact a brand new TOTL synth from Yamaha it is simply the latest in the 4 year refresh cycle.