So, if Site A has a line at 11.5 and site B has it at 16, what makes Site A's line "the best"
If I want the other side, Site's line would be "the best," would it not?
The point is, you should shop around. But to say that one site has "the best lines" is stupid, unless they are consistently 3 points off for all home teams or something like that, which is of course impossible.