Colorpicker Item; BASIC UI vs Android APP

I’m here because I wanna ask you something about color light management.

I’m setting un a project like these : Arduino+mqtt+rgb leds but I notice a difference between the BASIC UI Item and OH APP for android
Why these difference in item display?
The strip works better with Bacis UI. the other one seems to be unstable.
Did you know if both items gives out the same string of HSB values ???

Can someone help me to search for a solution?