Cant compare products . your dealer and the manufacturer have that data.

Hardened, thru hardened heat treated steel, steel links which use a square steel to make the links from are a good sign,
Bolt cutters will not grab the edges of square steel as well as the round stuff because then they get ahold of the center ..

A carbide disc in a power saw will cut any steel,but toothed blades are softer than hardened tempered steel

Locked bikes have had everything attached to them removed , so where you park matters, a Lot.