hello nabil
You misunderstood, once you upgrade the os of a standard X1 to 3.2a it will have the exact same functions as the oriental X1 trust me on this one, except the oriental one has few Arabic words on it and a joy stick, by having os 3.2a loaded in any X1 will allow you to access to Arabic notes in several different ways and I’m going to state them for you:

1-you can go to the utility page by pressing couple of buttons to get to a screen where it will display the notation table then by pressing any note of the highest octave it will detune it by -50,pressing it again will set it to 0.this is not a convenient way to use the Arabic tuning.
2-an easier way is to press button that says "TO ROOT" then you can use the last octave the same way, it’s quicker to use this way. But still not quick enough in live playing.
3-by pressing the button that says "SLOW/FAST" you can access one of 13 preset scales by using the volume buttons, now keep in mind and here where you got confused, those are preset scales and they don't act like the 13 switch quarter note box witch means by pressing one button it will cancel one scale and bring another preset one. Not very convenient.
4-the quarter note box witch's the most convenient way and you will need this box whether you have a regular or oriental X1.

cheers
eddy