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@edscoble
The casing (GB) is a lots more supple, it have great tread pattern that help in poor road surface and puncture, and felt (in my hand) more pileable than the Confrerie which felt very stiff.
the sidewall of the GB is a lots more flexible, which help reduced road vibration considerably.
These are only at first glance, I still need to try it first to compare it properly.