I don't neccesarily think so. We are generally talking classic naked / standard 1L catagory style here.
The Horex is made by a very smaller company in relation to gaint Honda, so that in itself explains a more expensive bike, if both companies had to produce the exact same bike.
Then add the cost of the R&D of the bike and motor, smaller production capability also given the much lower volumes at which this will sell at (sort of a viscious circle; high price low volume, low volume high price)
I realise the new CB1100 is not meant to be a replacement 919. But as I have been saying in other posts, they could have captured the classic styling of the past, but blend it with modern gear, frame, etc. I cannot see how a modernish frame, USD suspension and a good set of Brembo brakes will ruin a retro CB1100. Unless we are talking about producing a replica and not a retro. If anything it will make it more attractive for the younger market as well as targetting the older blokes. IMO the Horex looks or has a hint of retro in it and its not even based on a predecessor as far as I know.
The Ducati GT1000 is a good example of this, IMO. Just look at the front end and brakes.
Can you imagine the "wow" factor if Honda brought out a naked that had the CB1300 or the Blackbirds engine that looked along the lines of the Horex and sold it at a decent price (R&D already done on existing running gear)?