I would suspect that it would be just from the number of dice creating a lower (more efficient) current to each one.
By the way, I have some more info about the Pilot Whale (and also another new one, the Sea Lion.
The 6-chip LED is in fact the Osram Ostar Lighting LED. Bin code QY-GS and color temp 5700-8000k.
Both lights have 2 models, tactical and diving. Tactical should be available around June 10th and Diving around July 1st (dates aren't set in stone). The waterproofing rating is still going to be IPX-8 which means waterproof to manufacturer specs if I remember correctly, but currently they are saying 100M depth. It's still in the waterproof and corrosion testing phase however.
Both lights also have 2 modes, default and concealed, accessible via tailcap. I don't know any more about that yet though.
More pics: