Having to take care of several bikes, I am mulling to make a larger purchase of cassettes, chains and a few chainrings/cracksets, as this would save me money (one larger contingent). I am seriously considering standardizing on Deore components, as they offer the best value while shifting is still good enough for our needs (neither I, nor the other cyclists are racing).
(All except one of the bikes have XT front and rear derailleurs. Shifters are a combination Deore, LX and XT.)
As you can see, my main criterion is how long the components will last divided by the cost of such component. So, unless I am made aware that, for example, an XT chain (HG-93) will outlast TWICE a Deore chain (HG-53), I'd stick with the latter. And my humble impression is that a HG-93 won't last twice as much as a HG-53, nor will an XT cassette last twice as much as a Deore cassette.
Is that impression a correct one?