I shot the 4 blade stingers for a couple of years out of 50 lb bows and had great results. Solid blood trails and excellent flight. They are very easy to sharpen with a redi edge carbide sharpener. The bleeders are nice and solid, although a bit tough to sharpen but can be replaced.
I switched over to the WW elites for a couple seasons and again, no complaints, great flight and blood trails. Fairly easy to sharpen but I think the better edge goes to the stainless steel Stinger. It seems to keep an edge longer in and out of the quiver a little better.
I shoot quite a few deer each year and blood trails always varie. Some times the bigger head will leave a small blood trail and the smaller heads will leave a big trail. I thing they are both top heads, you have to decide which one gives you the weight you want, the sight picture you want and the one you can get the sharpest. Price is another story altogether. Both are pricey, one more than the other. As far as over all strength goes the WW comes out on top.
If I had to chose I'd stay with the stinger. They work very well with my setup and I can get them scarey sharp very quickly.