I still think The Shield is better than The Wire but both are quite different.
I admit that a lot of it might have to do with the experience of watching the show when it was aired. I still remembered the episode where Aceveda blew Juan and the next day, a local radio station had Benito Martinez on to talk about it

It was fucking awesome. Not to mention discussing the episodes, the highs and lows with friends who watched the show, etc.
I am glad to see that the show is getting its due. When it was on, a bunch of shitfucks on the internet thought 24 killed The Shield, which still baffles me to this day as 24 is boring at best.
I like them both but I still think The Shield is better than The Wire.