For me, probably the main downside to this one is zero insert effects. 28 for the Genos, 8 for the SX900, 5 for the SX700, there’s a ton of power in creating a perfect sound by the use of inserts. A phaser for a Rhodes, a guitar amp sim for a lead, spatializers on synth sounds, secondary reverbs, weird echo effects, bass compressors, the possibilities are endless...
If you want to individualize your sound, nothing is as easy as strapping a few inserts across some of the style or SMF parts as well as your solo sounds..! For these alone I think the jump up to the SX700 is worth it.
Hi Diki
Welcome back

I agree. I was always frustrated with my KB until the Genos.
Finally. Now I can create the sound I want.
Especially with all my guitar amps ...
However, the SX600 is probably geared towards a different audience that does not know or care. Just plug and play.
I am sure there are plenty of people out there that just want to play. I know a few.
They would be overwhelmed with programing anything

At least we have a few choices now, which is a good thing.
Eric