Attention to detail is vital for the profession of arms. Having said that, attention to detail does NOT imply sameness among many. Imagine if you will a section of soldiers in Canada, on parade, in Fighting Order. The sergeant comes by, and they all look the same. Finding faults would be easy. Now imagine the same section on parade, C9 gunners wearing C9 "stuff", same with riflemen. This rifleman has an M 203, that one doesn't. This rifleman has a special med kit, the others don't. Big friggin deal. The sergeant doing the inspection (imagine it's at WAATC, or any other battle school for that matter) checks each soldier's kit. Not for sameness, but for functionality (and cleanliness, of course, and all that other jazz). So-and-so has dust in his pistol grip. Big deal, right? I mean, it's not going to affect his weapon's function. Having said that, given that it's a garrison parade in barracks, that soldier just demonstrated that he didn't pay attention to detail (see above).
And as MG 34 said, functionality of kit is also important. Looking the same is "okay" if you're on parliament hill on a sunny Saturday, parading for the 125th anniversary of the founding of your respective regiments, but looking the same for sameness' sake in the fields of Panjwai is a potentially fatal error.
