Every gun, and every consumer product for that matter, is made to certain production tolerances. So, sometimes parts in one product will mate together more tightly than the same parts in another sample of the same product. As long as the parts are still within acceptable tolerances to ensure proper design function, this is perfectly normal. No two samples of the same product are ever EXACTLY the same. It's not economically feasible. They may be close down to millionths of an inch or microns of a millimeter, but there will always be some variance, the amount depending on how much expense is put into the manufacture of parts. These variations in fit between parts will cause slight changes in the sound they make when they interact. The difference may or may not be readily noticeable. You could have a different sound to the click simply from differences in mainspring and rebound spring pressure from one gun to the next. Or one gun could have a deeper SA sear notch than on another gun. There are a number of things that can make one gun's lockwork sound differently to another because there are multiple moving parts. Some guns just make more prominent mechanical sounds than others of the same model.
All we can go off of is your description, which sounds normal. Most likely if the gun is functioning fine, then there's nothing to be concerned about. We cannot say for certain without having the gun in hand to inspect though. If it functions fine and shoots well, I wouldn't worry about it. If something fails in the future, it can easily be fixed and you have a warranty.