Brand appeal, Peugeot, now you have really lost the plot. You can stop with the sly fox digs now, it's not 2010 any more.
There isn't really anything the 208 GTI can do better than a Focus ST, apart from the fact it might be more 'chuckable' and it's a bit newer. By all means buy a better quality car with brand appeal and other things that make up for the fact it's smaller with less power, but when there's 3 better cars the occupy the same area... why bother. You'd be bored with it after 2 weeks. That fact we're talking about turbocharged 3 litre RWD BMWs now says it all really.