Well Cold Sweat is very scooped, whilst the Aftermath is very Mid-Focussed. With your guitar being Maple Neck Thru & Maple Top, the CS may be a tad bright and aggressive in the top end. Advantages of the Aftermath is that it cuts through the mix very well, which makes it an ideal pickup for Djent, or bands with 2 guitar playes.
Question though: do you want an extremely surgical tight pickup? The Aftermath is one of thos pickups where you have to fight against it because it tracks very accurately, so you have to start playing with precision. A few people I know, including myself, didn't like the Aftermath for this reason. I like my Humbuckers to flow effortlessly, as to sounding like a noise gate is on full when I'm playing. Not trying to put you off, just a jump from EMG to Aftermath may be a shock at first haha. But Periphery do use them :)
And yes they are passive, and I don't see no reason why they shouldn't fit. Just remember to get 53mm if you have a trem, and 50mm if not. As well as short leg.