My wife sold her 3 Speedies because she felt they were a bit too common. Only plus point is that the material used for the speedy is good and tough.
For the Granville, it is made up of soft lambskin so it definitely is a bit more delicate but it has a hard bottom so the bag doesn't sag and loose its shape like the Speedy. The bag has an outer "shell" that allows you to put your phone or tissue paper etc without opening the bag itself.
And the bag is definitely something you don't see everyday. I bought hers when I was in London last year, because she wanted a particular colour from the 2013 Cruise Collection.
The sling comes standard but not the scarf, which I bought separately.
As for the price, let's say you can buy 4 normal speedies for one Granville.
Happy shopping!