Well, I don't know what color the 996 is, fascia-wise. If it is black, then it will probably be fine.
All I can say, is that the OE Porsche finish (Volcano Grey) in the 997 is most definitely NOT a PERFECT match to the EuroMotorSpeed unit. It looks great in the pictures, but I can assure you, having purchased one, it is NOT close to the pictures. It is in fact, several shades off. It was just not good enough for me, and certainly not good enough to put in my car...but I'm very picky.
Having purchased it, I was about to scrap the whole project until I found the other unit, and bought it with the hopes it would match. I was pleasantly surprised to see it was a dead-on match. Otherwise, I probably just wouldn't have changed, because to me having the fascia surround be as near perfect as possible, to leave a professional factory look, was paramount.
Now, of course, Porsche has released an OEM part in all black for the 2009 and beyond 997.2(s). Which is pretty damn sweet, but unfortunately, it is only available in black. The sizing is identical to the 997.1 cars, and it sux that they didn't release the part in Volcano Grey.
I had briefly considered buying that, and changing out everything in the center-stack to all black...but that was going to be very expensive, and the UK fascia ended up being a perfect match.
FWIW, I'm getting the EuroMotorspeed for installing this in my 996. Apparently they used to do the bezels in "piano black"

but now they've seen the light and are matching the plastic finish to the OE Porsche finish. I'll certainly post pics when I get it.