I thought you guys and girls might be interested in a real-world, no-nonsense sound comparison between the P-90 pickup and the humbucker using gear a mere mortal can afford.
All clips have the Casino going first panned slightly left and the Kasuga second placed slightly to the right.
Here are the neck pickups: Front Master
Next up both guitars with the selector switch in the middle position: Both Master
This is what the bridge pickups sound like: Bridge Master
And finally the rhythm guitars in the middle position with bluesy solos on top; first the Casino, then the Kasuga, both with their bridge pickups engaged: Both plus Solo Master
By the way (thanks Hannu):
Have you seen this video featuring two rather talented young guitarists, who play very similar looking guitars?