Zwilling J.A. Henckels ZWILLING Chef's Knife, 8 Inch, Black

Is there a difference between this knife and j.a. henckels international forged synergy 8-inch chef's knife which costs $35 ?

How wide (in millimeters) is the top "edge" of the blade, near the grip -- the part your hand bears down on during use? I like 4mm.

where is this knife made

What is the blade width?