MX Brown switch wear/variance

[precarious]

I purchased a Filco Majestouch 2 with MX Browns in January, used it at work and at home pretty much continuously for six months, and then damaged the cable (has since been replaced and works again).  I replaced it with the exact same model, and now that I have one with which to compare and contrast, the switches on the newer one feel much lighter or less stiff, the switches on the six month old keyboard just don't feel the same.  I even tested with some of the keys I'd never really used, such as F9 F10 F11 F12 and they seemed stiffer on the older board.

I'm just kind of curious as to how normal this is, or if I may have done something to the keyboard over those six months which caused the switches to stiffen up universally.  I never spilled anything in it and debris hasn't been anything other than you would expect from using a keyboard 15 hours a day.

[rowdy]

I haven't had either of my Ducky keyboards long enough to comment on wear, however each switch is supposed to last for 50 million presses, so in 6 months I would not expect that there would be sufficient wear to actually be noticable.

Also I have two Ducky Shine keyboards with Cherry MX blue switches, and they feel slightly different.  The first one has a lighter more clicky feel, whereas the second has a slightly heavier more clunky feel.

I use one at home and one at work, so different envirnoments, different desks etc. may contribute.  At first I just put it down to slight variations in manufacture.

It is not significant enough for me to worry about (apart from the up arrow key on the second keyboard that works, but does not always click).