I'm not sure if you actually read the report. I just don't see the kind of abuses publicized in this incident in India -- namely deceptive "bait-and-switch" and skimming/unpaid wages. For instance, according to the report, their main grievances are that (1) the use of contractors and apprentices who make up 15% of the workforce there and are paid lower; (2) overtime and Sunday where they are required to work 1 or 2 hours more or work on holidays/Sundays during high production season. (3) resistant to unions.
According to SCMP, most, or about 85%, of Wistron's factory workers are contractors[1]. While there seems to be some discrepancy between workers wages reported and received at Samsung factories, the figure reported by Apple/Wistron's factory workers are as much as ~45% less -- Rs 21,000 promised vs Rs 12,000 received.
Now, I'm not saying that Samsung is a better corporate citizen, but it's just that I don't hear Samsung's CEO parading around making grandstanding speeches about how ethically they run their business or socially, environmentally responsible they are, at least not as often.