This is my guess only...That's why I used the word 'if', because it's a hypothetical question. It could be 50%, 60%, 70%, I don't really know. The only thing that we can be sure of is the price. I've been using Taiwan rims for so many years already, luckily no problem so far except for a few dents caused by potholes/craters. My friends also haven't had any problems with their Taiwan made rims either. JRD also produces OEM cast rims for Proton, so I think cast aluminium rims from Taiwan is not that bad.And you would know Taiwan is 80% as strong, how exactly? The thing with Taiwan rims is credibility. You don't really know what you're getting do you..
Even with original used rims, there's still no guarantee that it will withstand pothole/kerb impact because it could have developed micro cracks caused by hazards on the road. However, I'm sure forged rims, even the used ones, have much better chance of surviving a massive pothole or hitting a kerb. If I have the $$$ to spend, of course I want to get original forged rims... These two types in particular: