Having poorer quality internal parts, we would assume like with any fake electronic parts that you would get less usage life, less efficiency to volt stabilisation, etc.
For example, FAKE pivot turbo timers don't work properly and become faulty after a short time.
Even look at fake Apexi Turbo timers on the market.
http://www.apexi-usa.com/news_special.asp
It is buyers choice to risk buying inferior products. We are only giving awareness.