I was really hoping that some Wilson's parent would respond. These questions were on our mind too when we visited the School on the Open day. From my recollection, Wilson's has very strong music and sports opportunities. I think their bias is on football, if I am not mixing it up with WCGS. Hope some one will correct me. One of the big advantage of this school is on site sports field which Sutton grammar and Tiffin lack.
Home work was mentioned to be reasonable - about an hours work a day. But could be more in senior classes. I think, they all do French and later, a second language.
Wilson's appeared to have maths/science bias, but other subjects are taught too. Liked the Head very much. Seemed very articulate and caring. Teaching is said to be really good as borne by results as well. However, also heard of quite a turnover of teachers in some particular science subject - don't recall which subject - 2 years back. This needs to be confirmed though.
Though the School is open selective, it was stated by Wilson's in 2011 that 85% of its pupil comes from within 5 miles radius. So plenty of opportunities for social mix-up among the students, in my view.