hello i'm confused over the front contours. different websites have listed A as slightly curved and others have listed this a C contour.

for example Debbies website

http://www.splitendshairreplacement.com/...ds_008.htm

and here its different

http://www.hairdirect.com/store/Walker-T...2AodvnPTVg

i've seen the same thing on other websites as well.

Which contour is A !?