The F686/M has 972hp and the F687/S has 923hp. and yes you are right, the F686/M has the Super Speedway record on all of the webpages. I just didnt mention that, to avoid confusion.
It doesn't handle nearly as well as the F094/S and it doesnt feel like it is accelerating as quickly, although the top end is nice, provided you dont have the downforce on full.