List price is US 1399 (direct from Fractal is 999), so it'll still end up the same. Generally, they just swap the dollar sign for a pound sign...
G66 are already quoting 1200 Euros, so less than £1100. So yes, the difference may not be as much as £450, might be closer to £300-350. Checking with local dealer if there's any discounts to be had on the Kemper.