Well, (I always want to be respectful to our hosts) there is a certain slant that Pro Tools lends itself to that, IMHO, is more powerful when doing certain tasks like editing, beat detection, audio stretching and setting up markers. But then, there are things where SONAR wins hands down. (Melodyne ARA, input monitoring is easier, loop recording and comping.)
If I am recording someone else, I prefer to use Pro Tools 11. If I am creating my own music, then SPat tends to shine there. That doesn't mean that I can't switch roles at any time and use either product if I want to. A little more refinement on AudioSnap and the implementation of some feature requests that I've posted in the Features forum and I'd be a totally happy camper with SPlat.
I'm not upgrading to Pro Tools 12 native (as of now) because I don't see that Avid really cares about my market segment. I wouldn't advise anyone to get on the PT 12 bandwagon unless they have the bucks to go whole hog with all the hardware and they have the business to support it and demand that level of gear.