MOST pavement are coarse enough to be grippy regardless of the sole. some that are worn smooth are trickier on leather than they are on rubber composition on footwear.
mostly its various types of tiles inside building that is often much more problematic.
CF of leather on asphalt, concrete, and indeed most surfaces are going to be worse than rubber. i cant believe this has to be even argued. athletic shoes are rubber soled for a reason.
(they all suck on ice.)