Ah, bunnings have a similar design
https://www.bunnings.com.au/trojan-150mm-adjustable-wide-mouth-wrench_p0105935?g...they call it a wide mouthed wrench.
there is also a difference in the shape of the outside of the jaws to a normal wrench .
Normal ones are much more rounded, these are more sloped
this style is thinner, they do come with longer handles if wanted.
The jaws are deeper for bigger nuts, they seem to be made of a tighter tolerance so the jaws keep more parallel to each other than others.
The jaws are also narrower for tighter locations.
I think they are made of a better steel also
For some reason, they seem to 'grip' the nut better.
Wrenches to me are not for doing nuts up tightly. A socket or spanner is for that.
Same as ratchets, they are not for higher torque work.