Tannk you all for your replies.
All the key action seems to be well weighted (all the 88 keys). Obviously, the feeling of pressing black keys is quite different of pressing white keys. Maybe this is for mechanical construction in both kinds of key but I'm not familiar with thechnical performance of Casio key action ( @Scott Hamlin Did you think about some specific issue? )
However, PX-360 feels different to me since I played PX-410R. And I'm talking about sound intensity. Black keys sound lower than white keys if I play them with same pressure. The first thing I did is turn off the "Touch response". Then, all notes did sound with same level. I read thet topic @tnicoson said and the problem seems to be the same. G3 sounds louder than nearest white keys just if I used medium pressure. I wanted to figure out if maybe Piano samples were the reason for this and I thought in MIDI velocity layers. I made a simple experiment: With the spine of a book (to simulate fixed pressure), I play both white and black key and record a MIDI track. I repeated it for three different octaves and the result was the same: black keys sounds approximately 25% less. I upload results images for you to see. I hope @Jokeyman123 can measure velocity to compare.
I don't know if this is normal on X-60 line because it's not one single key, it's all the black keys. I hope you can help me to answer my question: Is my PX-360 defective?