I have a 1570 with a Duncan Invader in the bridge position. It fit no problems, and it's way taller than the EVO.
The Invader has a thick, crunchy tone with alot of bass and bottom mids. Alot of people find it too muddy for their tastes. It's one of the hottest passive pickups on the market, and wasn't made with clean tones in mind. Apparently James Hetfield used one on the Master Of Puppets album.
The EVO is nearly as hot, but alot sharper. It sounds way more focused, and has alot more emphasis on the upper mids and the treble, and although it still has a full, punchy bass, the Invader sounds alot bigger and fatter. When it comes to clean tones, it's no vintage strat pickup, but it's way more versatile than the Invader. Some people describe the EVO as being too sharp, but when it comes to cutting through the mix it can't be beat.
If you want a chunky death metal riffing style tone, go with the Invader, but if you want a tighter, cutting tone more suited for leads check out the EVO.
Before you make your mind up, please note that i've read more than a few reviews saying that neither pickup is suited for basswood. Personally, i'm happy with my 1570 with Invader, so each to their own.
Hope this helped.