My Jackson SLSMG came with an EMG 81/85 set, and then my COW7 came with a EMG 707.. switched all those for Blackouts.
In the SLSMG I always prefer how the 85 sounded in the bridge and the 81 sounded in the neck, so I had already swapped those around. I switched to the Blackout Bridge and Neck, in the bridge & neck respectively. Both of them are way ballsier than the EMGs. The bridge, especially, had a lot more bass and got rid of the super scooped EMG 81 sound and just left me with shitloads of mids and probably too much lows.. with my Stiletto it sounded fine but with my Invader, it got a little muddy, so I ended up switching them around so now the bridge blackout is in the neck and the neck in the bridge. The Neck model in the bridge has a great, punchy, articulate chug and still has gain coming out its ass. All my 6 string drop B tunes are with the Blackout Neck in the bridge.. and then the Bridge model in the neck gives the fattest, smoothest lead sound you could possibly want.
And then the 7 string Blackout Neck just destroys the 707 in every way.. but I was never a fan of any of EMG's 7 string pickups.