Sorry to say, but with the CL604/605 it depends on the wind. Happens to me, that I had to fuel in Gander or on the way back in Shannon. At least in a commercial ops.
Part 91 or privat, who cares about etops. Heard rumors about a CL601 going nonstop from KTEB to LSGG and the Captain was bragging about it.
Cheers