Here is the problem many corporate jet operators have, being volume limited. We advertise and customers want to make max range, pilots fill up the plane to the shutoffs and do NOT get the advertised mass of fuel, on which, the advertised range is based. While the Jet A1 standard density is about .81 at 15C, you almost never exceed .795 or so, and that difference is not insignificant on a max range sector.
However, it seems low density fuel actually has greater energy content volumetrically, so compensates a bit (not fully) for the lower fuel weight. Or so I hope.
GF