The problem with the "Superbike" bars terminology is that over time, people have come to assume that any low rise bar falls into that category.
The real "Superbike" bars were the low rise, but
narrow bars fitted to the mighty Suzuki GS1000S "Wes Cooley replica", Kawasaki GPZ1100, Yamaha RD250/350LC, etc. These bars allowed a rider to sit in a semi racing crouch, with the ends of the bars not much more than shoulder width apart.
Nowadays, people are installing dirt bike bars on their bikes and mistakenly calling them "Superbike" bars. Seriously, some of them are that wide, that on a road bike they just look silly. You can cut the excess off the ends, but in many cases, you also need to remove some material from the centre sections too. Cheers, Terry.