The Steph set is my current favorite out of all 7 and 8 string sets, followed by the Abasi set. I personally dislike the Moderns, I find them to be slightly shy on bass and a bit flat and boring sounding but I can't deny that they still sound absolutely great in some guitars. Maybe it's also that I have been playing moderns just a few months after they first became available and I find every other model more interesting and appealing. I know that there have been some revisions and I played some very recent ones as well and still feel the same way about the moderns though. The Stef set basically has a bigger low end, a more interesting mid frequency character and slightly better and more open dynamics. The Tosin set is fairly similar to the Stef set, but sounding slightly tighter where as the Stef set is slightly more fat, thick and loose sounding, in terms of less compressed to my ears. I still feel that the biggest con of the Fluence line is that they don't quite achieve the dynamics of a great passive pickup, but when I use the Stef set in the passive voicing I get close enough to it that I mostly don't care about it, especially considering how great they sound and how much clarity they offer.