There is not alot of overlap between NB and KFS except maybe some with Markel. KFS does non-standard non-commercial vehicle, for the most part, whereas NB does mostly commercial P&C.
KFS specializes in auto facility in Canada, high risk auto in the US, long haul trucking in the US, and motorcycles. I have never been able to figure out why they cant get the underwriting fixed in this operation since it is mostly short tail. It's not as if they are only a little bit wrong either.
As Stubble says, I think they will take at least a couple of years to clean up the past bad underwriting. They have no special investment capability to overcome the bad underwriting. They do alot of their business through MGAs. Everything FFH has learned to avoid KFS practices.
P&C is a crappy business as Buffett has shown over and over. The only thing that makes it work is great investment management, and the ability to pull away when rates are crappy. Kingsway has had neither. Changing a culture will be very difficult especially during a proxy fight for control.
I have owned and made a little money from this in the past. I sold my last shares in the low 20s at least a year ago. By the third announcement of bad reserving from Lincoln General I had had enough of the promise never delivered.