Some very interesting information about the JPK 1010 that probably is relevant for other similar cases:
They have compared a 1010 in IRC set up (Keel without a bulb and a single rudder) with a 1010 on Ocean Racing configuration, with a bulbed keel and two rudders. Boats in the water at the same time with wind conditions between 13 and 20K.
This an old post about JPK 1010. Is this a public report? Pics and details about the keels are very interesting. I like the size of JPK 1010 and the performance seems to be good.