[Amps] Why not use the ORANGE button?

[Charles Henry]

I see extoling comments re K3 clean xmitter.  What about the Yaesu transceivers with the ORANGE button (some call it red)?  Any Yaesu owner has stepped up to the plate and said he just uses his orange button on (ALWAYS at full power, max RF power knob fully clockwise).... and explains and extolls that strategy to put out cleaner signals???
 
Someone, please just state how much the orange button Yaesu-s help, preferably compared to the K3.
Thanks mucho,
73, Charly