Doubtful anything particular, maybe a different flavor of REQ/dsp in other brands. A newer one from D&M would could use the Audyssey editor app, tho, which is more flexible in how you might apply eq.....
I doubt you'd find much difference in longevity among avrs either, just make sure you ventilate/add cooling for yours to help extend life....you might consider separates but that may not be particularly cost effective but you could probably plan on keeping power amps around longer. Or just consider adding a power amp if you think power's holding you back....