The Whiteline mounts are heavy-duty and designed to take the stress of a bar 3x stiffer.
You can see the wimpy stock steel swaybar mount. You can imagine it is going to break really easily.
You can see that the White line mount which is made out of a stout aluminum extrusion is easily strong enough to do the job.
The Whiteline mount uses two bolts instead of one bolt and a tab. This is a lot more solid than the tab and small bolt.