Yes, the Philips do have the best output for their color. So in this case you were probably use to brigthness instead of actual output which you would notice when you're driving on the road; this is where you will notice the difference.
Yep, cool white with hint or not hint of blue.
2011 USB/Black IS 250 F Sport/F-Sport High Flow Air Filter/Philips Ultinon 6000K D4S and Xenon HID Conversion Kit 6500K H1 Projectors/3M Venture Shield/JLC Lighting/JDM Aero Underbody Panels/F1 Pinnacle 35 and 40/Llumar Air Blue 80
2007 BWB/Light Gray IS 250 AWD/F-Sport High Flow Air Filter/Philips Ultinon 6000K D4S (Sold)
Just an update - these bulbs have started to stabilize - nice even brightness and white color with a hint of blue as above. Cutoff is sharp, coverage is wider. I even put my old aftermarket bulbs back to compare and these are definitely superior.
I'm in the process of upgrading my car to the 2012's and I would like to replace all the bulbs including the ones in the fog-lights. I'm after the pure-white/bright but I don't want any trouble from the PD, either. Could you PM me with a recommended package and what I might be looking at - any discount for buying a package like this?