guys isnt it obvious

Having a good scheme is equally important. Grant and Smith didn't just wake up bad one day.

The Giants took four guys and beat 5 guys. Not just beat the 5 guys - beat them and got to the QB and took the QB down (not sackes in all cases) but took him to the turf.

We have the same scheme (at least I think we do) but rarely if ever do 4 of ours beat 5 of theres.

Is that scheme or personel or both?

I think both but heavily weighted to personel.