It can be confusing comparing cables and their specifications, particularly when the resistance, capacitance and inductance might be quoted per foot, per meter or per kilometer.
The Furutech appears to have nearly 4 times more resistance per foot, about 1/3 of the capacitance per foot, and they don't specify inductance at all.
Resistance:
Bryston = .0008 ohms/ft vs. Furutech = .003 ohms/ft (~ 10.5 ohms/km)
Capacitance:
Bryston = 70pF/ft vs. Furutech = 23.8pF/ft (~ 78pF/M)
It's difficult to predict a sound based on specs, and one cable may be more suited to one amplifier than another. But certainly Bryston has tested their cables with their amplifiers.
When Bryston describes their cable, the "twisted" refers to the 4 insulated conductors twisted together in perhaps a star-quad or similar type of configuration, but the conductors are designed to be electrically connected (or twisted) together as pairs for non bi-wired speakers.
Steve