I purchased a MacBook Pro 13 Retina in a genuine Apple Store in China and the keyboard was a lot quieter than I remembered with my experience with my MacBook Pro 15 Retina with the Haswell processor. Unfortunately I had to return it because the charger was incompatible with the ones in the US (where I live) I purchased the same model in the US on eBay (sealed box) but it seems that the keyboard is really loud (louder than any high end keyboard I can remember using). Was it because I received an older version (both are 2015 models) or do the Chinese models simply have quieter keyboards or is it just random luck? Could I take it to an Apple store in the US and have them replace the keyboard with a quieter one? How much would that cost?