The KeyOne Black Edition is, as the name suggests, a black version of the phone, which does away with the silver edging of the regular model. It comes with 4GB rather than 3GB of RAM too, and you can get it with 64GB of storage -- a boost over the 32GB on the standard model.
Those boosts raise the price a touch, costing £549 (rather than £499) in the UK. US and Australian availability of the new model isn't yet known but that price converts to around $710 or AU$890.
I do like the stark black version of the phone, although it's disappointing BlackBerry hasn't shown off any properly new hardware at the show. It did tease an, however, that will arrive in October.