I think you bought the Swiss ETA from me?
The quality of the Swiss ETA 7750 is much more superior to the Asian 7750. The Asian 7750 will do the same job and maybe/maybe not last the same length of time. But the Swiss ETA 7750 is a much better movement, the parts are better quality, with better fit and finish compared to Asian 7750, parts are readily available and generally overall a better movement. Simple check, wind an ETA 7750 and then wind an Asian 7750 you will feel the difference instantly! Swiss ETA is much smoother.
Its simple ETA 7750 is a better but movement but the Asian 7750 will do the job just as well
onto your watchmakers comment
"he informed me that the Swiss movement was no better quality than the Chinese"
This is simply not true, the Swiss is much better but the Asian will do the same job
EDIT: the reason Mickeys movement looks different is that it is has a cotes de geneve finish, its only a finish thats different, the movement is exactly the same