This paper is from 2017 but their promised pay is much less than what Apple's supplier here originally promised (and then reneged on, which is likely a large motivator for the rioting): https://goodelectronics.org/wp-content/uploads/sites/3/2017/...
You can also easily find articles about Samsung's factories in Vietnam if that suits your fancy.
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.