don't think you understand the point here, let me try to explain better.
You wouldn't look at World of Warcraft and say "Oh in comparison to WoW D3 sucks," because they are two different games. Looking at comparisons between two different genres is fine if you're looking at their similarities to see how they are analogous, but contrasting them to make a point about which one is better than the other doesn't work when they are two completely different games
I never said one was better than the other, did I? all I said was that guild wars 2 have some features that diablo could have, hence the comparison. I also added that they had the about the same development time, so its more fair to compare. Its not like I'm comparing to World of Warcraft that's been in the market for a decade, or a soccer game that have nothing to do with it. -_-'
That might hold true if you attempted to actually make a fair comparison instead of just listing things you like about GW2.