I have a 2007 Brera and my wife had a "facelift" 2008 Spider.
There's actually no visible facelift on the outside of the cars at all, though late 2008 cars got a new design for the seats. There is a bit of debate over which seat is better. I'd say the later seats look cooler but they do both look good. I'd say the earlier seats are comfier but the later seats are more supportive in the corners (but I would get a little uncomfortable in the later seats after about 20-30 mins).
Another difference is that the later cars are lighter by 20kgs, but I'm really not sure anyone could actually tell any difference.
Finally, earlier cars had an aluminium centre console which looks silvery, whilst the later cars got the exact same aluminium but finished in black. The original silvery console can theoretically shine sunlight into your eyes, but I've got that console and I've never had a problem in my Brera. Allegedly it could be more of an issue of a spider but to be honest I really don't think you're going to have much of an issue in the UK! I've had both types and personally I much prefer the look of the original silvery aluminium.
To complicate matters, the earlier cars actually had MORE real aluminium than the newer cars - namely the strips in the doors. These were replaced with shiny plastic for the later cars, which was a bit of a shame.
So in summary, there's really not much difference at all between original and "facelift" cars. No one can tell any difference from the outside, and even on the inside only a true Alfisti would know.
Brat Pack no.8