I too was tempted by this for a long time too, even had the bulb on my eBay watchlist and it got relisted like 5 times, lol
And when Gervais found his lying about and had sold one already, I couldn't wait any longer.
Look at the pic and you'll see that the difference is that the ex-foglight is a little "shinier" with the reflector in.
The only reason I left it in was that if it was actually needed, then it might focus the light a little more and shoot it out the back so to speak.