I had a 16m havoc and traded it for a 14m epic screamer. Pulls like a 16 and turns like a 12. You'll see lots of foment on the brand, Dmitri does alot of promotion on this forum, and some don't like that. But the kite is solid. Check one out if you can, you won't be sorry.
And no, I don't sell for them or anything, just appreciate a good product!
Maybe you know all that and have read about it but just in case you haven't :
1/ new closed cell foils (eg Flysurfer Speed3) are superb lightwind kites to my experience
2/ A bigger lightwind board helps a lot to kite on lightwind days
Haven't flown the Evo, but I love the Big Mamma. Demoed the BM and the Zephyr and it was a really easy choice for me because the BM turns so much more quickly. Thought the Zephyr was a snoozer by comparison. I love being able to ride my normal twin tip in light wind.
We did a head-to-head test with a Big Mama and a GK-Trix 15m at the L.A. Expo last summer and the Trix turned faster, went upwind better, and had more pull. This was a test in about 12-13mph with a 175lb. rider.
Upwind ability was obviously better from the shore, but turning, was what the rider, Mat Sweeting told me.