I have not used the psycho yet, i think the top end of the 9.5 psycho is higher as well. If you have seen the fuerteventura flysurfer pics, you can see a guy flying with the 15.5 psycho(red and Black), this is ted bautista, and the 15.5 is just about the only kite he uses in most windspeeds(yes, 25 knots). I believe he is over 100 kilos though, and he is a pro rider as well.
The 9.5 should easily be taken to 30. I have taken my warrior 9.3 to 27 on a 138 loose EX.
The max top end on the 15.5 should be around 22 knots for us mortals.
The warrior 9.3 was already a 10-25 knot kite with a 160 cm board... 15-30 knot kite with a wakeboard...
The psycho should be able to go as low, but because of the more agressive power up function, most people will stall the kite too often and get frustrated in winds below around 14 knots. Secret is not to try to power up too much in low winds. Probably similar to an X2 or Mach1...
The upper wind limit is going to be at least around 30 knots if not higher. Only launching is a problem at that high wind speed. Once it is launched, it should be no problem staying in control.
The day I was out in gust of 28 knots I was fully in control. And the conditions were really gnarly 1m short high swells and really gusty winds. Those are usually the kind of conditions which take at least 5 knots off my top end because I can't maintain a clean edge.
the 12 physio goes in about 2-3 knots less than the warrior, having ridden both the 9 and the 12 of each type back to back extensively, i can guaranteee this.
however the physios are trickier kites to fly in low winds due to the bar action. but then again most people who flew the warriors in light winds always made the mistake of pulling the power in when what they should have been doing was picking up board speed and trying to use as much depower as possible.