Yes, whites would be MUCH brighter, it's not so much that these aren't bright, if you look directly at them it'll leave a halo in your eyes, but they are only one directional; and the red makes darker shades harder to see, and pretty much everything is a darker shade at night except reflective objects.
The set of other bulbs that's in the mail has panel bulbs, so it may completely fit into where the reflector was, appartently there are 18 LED's per panel and all dome lights including the hatch dome and all side bulbs will be converted
I realized last night that I could custom fab the reflector piece by snipping the dome and extending it out farther, but then when you depress the cover to toggle them on/off it would hit the reflector
I don't know if you can clearly see the reflector from the picture but the OEM light directs light at a dome, the dome directs it back at two semi-circular pieces and then out into the cabin. It gives a wider spread of light, but not as bright.
As far as other LED's I haven't come across any. I would imagine it would be very hard to fit an LED bulb within the original specs of the regular bulb. There are 3 transistors, a circuit board, and 9 LED bulbs. Maybe someone makes a bulb with only 3-5 LED's but you would loose a lot of light. You could definetly make your own with a simple circuit board some solder and LED's, the female unit that you plug the bulb into is very flexible (it can expand up to 1/2" and still give power) so you could make a wider circuit, more LED's and still fit them in the reflector by putting the male piece into the reflector BEFORE putting the reflector back into the housing. Probably more economical if you know how to solder and go to a specialty computer or electronics lighting store an jus bought a grip of LED's, boards, and solder. I don't have the time