No contest. The Havian is a much more complete, feature-rich instrument. And I would wager that the piano action is probably more realistic too.

A couple of months ago this came up and I recommended the Havian as the best piano-based arranger. I understand it has been discontinued, but I stand by that recommendation. Now the only option would be to MIDI a stage piano to a MOTL hardware arranger. The BK-7m is a nice module but it doesn't have on-board style creation if you need that (and the Havian did!)