Wednesday: Anywhere from (roughly) Shalesmoor roundabout north and west, Upperthorpe, Shirecliffe, Stannington, Cross, Hillsborough, High Green, Chap, Malin Bridge, Ecclesfield, Stocksbridge, Grenoside, etc
Pigs: Anywhere from (roughly) Bramall Lane south and east, Highfield, Sharrow, Manor, Arbourthorne, Heeley, Woodseats, Darnall, Handsworth, Woodthorpe, around Crystal Peaks etc
That being said, I know Owls from most of those United areas, and there'll be blades in those Wednesday areas. I work at a warehouse in S9 and most the Owls I work with are from Manor/Arbourthorne.
Live in S3 Broomhall now myself and live opposite an Owl and a Blade. It's varied all over the city, you'll find more of one type in each area but there's no definitive answer, especially not in terms of social class standings.