It all comes down to what we are use to...Just as John says the Korg is easier to use...and Diki will tell you Roland is easier...and Gary will say Yamaha...

The fact is you have to apply yourself to understand a system..

Just yesterday, a friend (Pro musician), had problems with his Korg PAx...His start/stop buttom..sunk (literally)..on the job..He has taking it apart and fixed it, but he did not know there were work arounds to finish the job...He has played this keyboard for 9 years or so...and is a long time Korg owner..

I asked why he didn't put the start/stop on the assigned pedal..The look from him was my answer..He had no clue what I was talking about..
Sometimes this is the way folks use their gear..to do what they think they want and no further....We all have to understand the gear we use....I have found nearly every problem to be human error..