I very much doubt if the LAA accident per hour in a as low as that for C of A aircraft.
This is not a criticism of LAA aircraft just a realization that the LAA fleet flys a lot less that C of A aircraft and due to this a small number of accidents can have a large effect on the hourly accident rate.
The main reason Permit a/c are now allowed to overfly built up areas is largely due to their past safety record.
Probably not believed by most but Permit a/c are maintained by dedicated people, I have seen "maintenance" by the CofA outfits & would be very wary of flying anything "just out of maintenance".
It would be interesting to see comparative figures.