Compared to a tractor-semitrailer loaded to maximum gross weight, how does a bobtail tractor (pulling no semitrailer) typically perform when stopping?

AAMVA CDL Manual, Section 6.1.3 'Brake Early,' p. 6-1

Drivers sometimes assume a bobtail tractor, being lighter with no trailer attached, is the easiest configuration to stop quickly, but the manual shows the opposite. This matters anytime a driver is running empty between loads and needs to plan extra following distance and braking room.