I noticed that the mouse that came with it have a larger gap space between the upper transparent plastic and the aluminum below it.
Besides new colors, the Magic Mouse hasn’t changed since 2015. Personally, I have not noticed any difference at all even compared to the 2009 revision when it comes to the button or touch interface, only the removal of replaceable batteries and addition of the lightning port. I have had several of them, including one that came with a 2017 iMac and one that was purchased new as late as last year.
Of course there could be minor differences and adjustments in the production process, and also differences between individual units, but I wouldn’t expect such differences to be noticeable.
Could you take a photo that illustrates what you are describing?
Unlike my mouse that came with 2017 iMac, it hurts to click on it.
What causes the pain? Pinching the skin? RSI? Sound too loud?
If I sent in my 2017 mouse for repair, will they actually repair it or will they replace with a more modern version of the mouse that hurts to click on?
Unless you take it to an indie repair shop and specifically pay to have it repaired, it will probably just be replaced.
What do you guys think about Magic Trackpad?
Personally, I find it unusable. Others love it. The experience is so subjective, you’ll have to try it yourself.