They are the same. When you turn during the day, your DRL flashes on and off. I just changed out my amber DRL bulbs for clear. It does look much better. I'm against full time DRL's (I had them turned off on my 4th Gen) but now that the 5th Gens are switched I think they come in handy. There are times when I would like lights on but don't want my stereo display unreadable because of dimmed instruments, such as driving into a sunset, etc. The yellow DRL's are next to useless. The white lights are much better IMO.
I did some research and apparently clear signals are legal in many states as long as they are only visible in the front.
You get at the bulbs from underneath. Just a quarter turn counterclockwise and the socket pops out of the reflector. Another quarter turn and the bulb pops out of the socket