Somehow the SP5 looks quite different because they changed the seat unit.... but that is a matter of taste. SP5 doesn't do it for me as is looks like a road bike.
The others have the meaner look of race machines.
As for the ohlins, I think they changed for cost reasons. Ducati is still using those although seals still blow for no reason (one seal gone at 2500miles on my 996SPS!).
Threaded Mode